EFM8 Sleepy Bee 产品系列 EFM8SB2 数据表 EFM8SB2 是 Sleepy Bee 系列的 MCU, 是全球最节能的小封装且功能全面的多用途 8 位微控制器 这些设备采用小型封装, 结合创新的低功耗技术, 从节能模式中唤醒时间短, 非常适合所有电池驱动式应用 EFM8SB2

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1 EFM8 Sleepy Bee 产品系列 EFM8SB2 数据表 EFM8SB2 是 Sleepy Bee 系列的 MCU, 是全球最节能的小封装且功能全面的多用途 8 位微控制器 这些设备采用小型封装, 结合创新的低功耗技术, 从节能模式中唤醒时间短, 非常适合所有电池驱动式应用 EFM8SB2 系列采用高效的 8051 内核 6 位电流参考和精密模拟, 也是嵌入式应用的最佳选择 EFM8SB2 应用包括以下功能 : 手持设备 工业控制 电池驱动式消费电子设备 传感器接口 节能 最低 MCU 睡眠电流和电源掉电检测 (50 na) 最低 MCU 有效电流和这些功能 (24.5 MHz 时钟速率时 170 μa / MHz) 使用内部 RTC 操作和电源掉电检测的最低 MCU 睡眠电流 (<300 na) 数字和模拟外围设备的快速唤醒 (< 2 μs) 集成低压差 (LDO) 稳压器以在所有电压下保持超低有效电流 Core / Memory Clock Management Energy Management CIP Core (25 MHz) External Oscillator Low Power 20 MHz RC Oscillator Internal LDO Regulator Power-On Reset Flash Program Memory (up to 64 KB) RAM Memory (4352 bytes) Debug Interface with C2 External 32 khz RTC Oscillator High Frequency 24.5 MHz RC Oscillator Brown-Out Detector 8-bit SFR bus Serial Interfaces I/O Ports Timers and Triggers Analog Interfaces Security UART I 2 C / SMBus External 2 x SPI Pin Reset Interrupts General Purpose I/O Pin Wakeup Timers 0/1/2/3 Watchdog Timer PCA/PWM Real Time Clock ADC Comparator 1 Comparator 0 Internal Voltage Reference Internal Current Reference 16/32-bit CRC Lowest power mode with peripheral operational: Normal Idle Suspend Sleep silabs.com Smart. Connected. Energy-friendly. Rev. 1.2

2 EFM8SB2 数据表功能列表 1. 功能列表 EFM8SB2 突出功能如下所列 内核 : 流水线式 CIP-51 内核 与标准 8051 指令集完全兼容 70% 指令的执行时间为 1-2 系统时钟周期 25 MHz 最高工作频率 内存 : 最高 64 kb 闪存, 可在系统内对固件重新编程 最高 4352 字节 RAM( 包括 256 字节标准 8051 RAM 和 4096 字节片上 XRAM) 电源 : 用于 CPU 内核电压的内部 LDO 稳压器 加电复位电路和掉电检测器 I/O: 最多共 24 组多功能 I/O 引脚 : 偏压下所有引脚耐受 5 V 电压 用于外围路由的灵活的外围设备交叉开关 5 ma 源电流,12.5 ma 吸收器允许直接驱动 LED 时钟源 : 内部 20 MHz 低功耗振荡器, 精度 ±10% 内部 24.5 MHz 高精度振荡器, 精度 ±2% 外部 RTC 32 khz 晶体 外部晶体 RC C 和 CMOS 时钟选项 定时器 / 计数器和 PWM: 32 位实时时钟 (RTC) 6 信道可编程计数器阵列 (PCA), 支持 PWM 捕获 / 比较 带有看门狗定时器功能的频率输出模式 4 个 16 位通用定时器 通信和数字外围设备 : UART 2 个 SPI 主 / 从 SMBus / I2C 主 / 从 外部存储器接口 (EMIF) 16 位 /32 位 CRC 单元, 支持 1024 字节边界内闪存自动 CRC 模拟 : 可编程参考电流 (IREF0) 10 位 AD 转换器 (ADC0) 2 个低电流模拟比较器 片上非侵入式调试 全内存和寄存器检查 四个硬件断点 单步执行 预装 UART 引导装载程序 -40 至 85 ºC 温度范围 单电源 1.8 至 3.6 V QFP32 QFN32 和 QFN24 封装 借助芯片上加电复位 电源电压监控器 监视程序定时器和时钟振荡器,EFM8SB2 设备成为真正独立的系统单芯片解决方案 闪存是可编程内部电路, 提供非易失性数据存储以及支持固件的现场升级 片上调试接口 (C2) 允许使用安装在最终应用中的生产 MCU 进行非侵入式 ( 不使用片上资源 ) 全速 内部电路调试 此调试逻辑支持检查和修改存储器与寄存器 设置断点 单步执行以及运行和停止命令 进行调试时, 所有模拟和数字外围设备的功能都得到充分发挥 各设备的指定操作电压是 1.8 到 3.6 V, 适用于 24- 针 QFN 32- 针 QFN 或 32- 针 QFP 封装的元件 所有封装选项均符合无铅和 RoHS 要求 silabs.com Smart. Connected. Energy-friendly. Rev

3 EFM8SB2 数据表订购信息 2. 订购信息 EFM8 SB2 0 F 64 G A QFN32 R Package Type Tape and Reel (Optional) Revision Temperature Grade G (-40 to +85) Flash Memory Size 64 KB Memory Type (Flash) Family Feature Set Sleepy Bee 2 Family Silicon Labs EFM8 Product Line Figure 2.1. EFM8SB2 部件编号 所有 EFM8SB2 产品系列都具备以下功能 : 运行频率高达 25 MHz 的 CIP-51 内核 三种内部振荡器 (24.5 MHz 20 MHz 和 16 khz) SMBus/I2C 2 个 SPI UART 6 信道可编程计数器阵列 (PWM 时钟生成 捕获/ 比较 ) 4 个 16 位定时器 2 个模拟比较器 6 位可编程电流参考 10 位 AD 转换器, 配有集成多路复用器 电压参考和温度传感器 低电流 32 khz 振荡器和实时时钟 16 位 CRC 单元 预装 UART 引导装载程序除了这些功能外,EFM8SB2 系列的各元件随产品系列不同而具有不同的功能集 产品选择指南列出了各系列元件的可用功能 Table 2.1. Product Selection Guide Ordering Part Number Flash Memory (kb) RAM (Bytes) Digital Port I/Os (Total) ADC Channels Comparator Inputs Pb-free (RoHS Compliant) Temperature Range Package EFM8SB20F64G-B-QFN Yes -40 to +85 C QFN32 EFM8SB20F64G-B-QFP Yes -40 to +85 C QFP32 EFM8SB20F64G-B-QFN Yes -40 to +85 C QFN24 EFM8SB20F32G-B-QFN Yes -40 to +85 C QFN32 EFM8SB20F32G-B-QFP Yes -40 to +85 C QFP32 EFM8SB20F32G-B-QFN Yes -40 to +85 C QFN24 silabs.com Smart. Connected. Energy-friendly. Rev

4 EFM8SB2 数据表订购信息 Ordering Part Number Flash Memory (kb) RAM (Bytes) Digital Port I/Os (Total) ADC Channels Comparator Inputs Pb-free (RoHS Compliant) Temperature Range Package EFM8SB20F16G-B-QFN Yes -40 to +85 C QFN24 silabs.com Smart. Connected. Energy-friendly. Rev

5 EFM8SB2 数据表系统概述 3. 系统概述 3.1 介绍 Power On Reset/PMU CIP Controller Core Port I/O Configuration Digital Peripherals C2CK/RSTb VDD GND Debug / Programming Hardware C2D Power Net Analog Power Wake Reset VREG 64/32/16 KB ISP Flash Program Memory 256 Byte SRAM 4096 Byte XRAM Digital Power SYSCLK System Clock Configuration SFR Bus UART Timers 0, 1, 2, 3 PCA/WDT SMBus SPI 0,1 CRC Priority Crossbar Decoder Crossbar Control External Memory Interface Port 0 Drivers Port 1 Drivers Port 2 Drivers P0.n P1.n P2.n Precision 24.5 MHz Oscillator Control Address Data Low Power 20 MHz Oscillator Analog Peripherals XTAL3 XTAL4 XTAL1 XTAL2 External Oscillator Circuit RTC Oscillator Internal VREF 10-bit 300ksps ADC External VREF AMUX VDD VREF Temp Sensor GND Comparators 6-bit IREF IREF0 Figure 3.1. EFM8SB2 方框图详情 本部分描述的是较高水平的 EFM8SB2 产品系列 欲了解关于各个模块的更多信息, 包括寄存器定义, 请参见 EFM8SB2 参考手册 silabs.com Smart. Connected. Energy-friendly. Rev

6 EFM8SB2 数据表系统概述 3.2 电源 所有内部电路由 VDD 供电引脚供电 外部 I/O 引脚由 VIO 电源电压供电 ( 或设备上无独立 VIO 连接的 VDD), 大多数内部电路由片上 LDO 调节器供电 根据需要启用 / 禁用各个外围设备可以控制设备功耗 每个模拟外围设备在不使用时都可以禁用, 从而置于低功耗模式 在不使用数字外围设备 ( 如定时器或串行总线 ) 时, 时钟将关闭且消耗较少电量 Table 3.1. Power Modes Power Mode Details Mode Entry Wake-Up Sources Normal Core and all peripherals clocked and fully operational Idle Core halted Set IDLE bit in PCON0 Any interrupt All peripherals clocked and fully operational Code resumes execution on wake event Suspend Core and digital peripherals halted Internal oscillators disabled Code resumes execution on wake event 1. Switch SYSCLK to HFOSC0 or LPOSC0 2. Set SUSPEND bit in PMU0CF RTC0 Alarm Event RTC0 Fail Event Port Match Event Comparator 0 Rising Edge Stop All internal power nets shut down Set STOP bit in PCON0 Any reset source Pins retain state Exit on any reset source Sleep 1 Most internal power nets shut down Select circuits remain powered Pins retain state All RAM and SFRs retain state Code resumes execution on wake event 1. Disable unused analog peripherals 2. Set SLEEP bit in PMU0CF RTC0 Alarm Event RTC0 Fail Event Port Match Event Comparator 0 Rising Edge Note: 1. Entering Sleep may disconnect the active debug session. 3.3 I/O 数字和模拟资源可以通过设备的多功能 I/O 引脚来实现外部调用 端口引脚 P0.0-P2.6 可以被定义为通用 I/O (GPIO), 通过交叉开关或专用信道被分配至其中一个内部数字资源, 或者被分配至模拟功能 端口引脚 P2.7 可被用作 GPIO 此外,C2 接口数据信号 (C2D) 可与 P2.7 共享 最高 24 个多功能 I/O 引脚, 支持数字和模拟功能 数字外围设备分配的灵活的优先交叉开关译码器 各引脚配有两个驱动强度设置 配有专用中断向量 (INT0 和 INT1) 的两个直接引脚中断源 配有共用中断向量 ( 端口匹配 ) 的最多 16 个直接引脚中断源 3.4 时钟 CPU 内核和外围设备子系统可以按照内部和外部振荡器资源来设定时钟 默认情况下, 系统时钟运行的情况为 :20 MHz 低功耗振荡器 8 分频 为内核和外围设备提供时钟 20 MHz 低功耗振荡器 (LPOSC0), 随电源和温度变化, 精度为 +/- 10% 24.5 MHz 内部振荡器 (HFOSC0), 随电源和温度变化, 精度为 +/-2% 外部 RTC 32 khz 晶体 外部 RC C CMOS 和高频晶体时钟选项 (EXTCLK) 时钟分频器具有八个设置, 可实现灵活的时钟调整 : 将所选的时钟源分频为 : 或 128 silabs.com Smart. Connected. Energy-friendly. Rev

7 EFM8SB2 数据表系统概述 3.5 定时器 / 计数器和 PWM 实时时钟 (RTC0) RTC 是超低功耗 36 小时 32 位独立计时且带有警报的实时时钟 RTC 具有专用 32 khz 振荡器 无需外部电阻或负载电容, 如果外部晶振故障, 缺失时钟检测器功能将使系统发出警报 片上负载电容可编程为 16 种离散电平, 兼容各种晶体 RTC 模块包括以下功能 : 长达 36 小时 (32 位 ) 独立计时 支持外部 32 khz 晶体或内部自振荡模式 16 级内部晶体负载电容 运行于最低电源模式下并覆盖所支持的全部电压范围 从最低电源模式下唤醒或复位设备的警报和振荡器故障事件 可编程计数器阵列 (PCA0) 可编程计数器阵列 (PCA) 提供增强的定时器和 PWM 功能的多个信道, 与标准计数器 / 定时器相比, 它需要较少的 CPU 干预 PCA 的各信道由一个专用的 16 位计数器 / 定时器和一个 16 位捕获 / 比较模块组成 计数器 / 定时器由具有灵活的外部和内部时钟选项的可编程时基驱动 每个捕获 / 比较模块可配置为在五种模式中的一种模式下独立运行 : 边沿触发捕获 软件定时器 高速输出 频率输出 或脉宽调制 (PWM) 输出 每个捕获 / 比较模块有其自己的关联 I/O 线 (CEXn), 这些线在启用时通过交叉开关连接到端口 I/O 16 位时基 可编程时钟分频器和时钟源选择 最多六个个独立配置的信道 和 16 位 PWM 模式 ( 沿对准操作 ) 输出频率模式 捕获上升沿 下降沿或任何沿 比较任意波形生成函数 软件定时器 ( 内部比较 ) 模式 集成监视程序定时器 定时器 ( 定时器 0 定时器 1 定时器 2 和定时器 3) 设备中包含几个计数器 / 定时器 : 两个是 16 位计数器 / 定时器与标准 8051 中的计数器 / 定时器兼容, 另外两个是 16 位自动重新加载定时器, 可用于定时外围设备或作为通用定时器使用 这些定时器可以用于测量时间间隔 对外部事件计数或生成周期性中断请求 定时器 0 和定时器 1 几乎完全相同, 有四种主要工作模式 其他定时器都提供带有自动重新加载和捕获功能的 16 位和分割 8 位定时器功能 定时器 0 和定时器 1 包括以下功能 : 标准 8051 定时器, 支持向后兼容固件和硬件 时钟源包括 SYSCLK SYSCLK(12 4 或 48 分频 ) 或外部时钟 (8 分频 ) 或外部引脚 8 位自动重新加载计数器 / 定时器模式 13 位计数器 / 定时器模式 16 位计数器 / 定时器模式 双 8 位计数器 / 定时器模式 ( 定时器 0) 定时器 2 和定时器 3 是包括以下功能的 16 位定时器 : 时钟源包括 SYSCLK 12 分频 SYSCLK 或 8 分频外部时钟 16 位自动重新加载定时器模式 双 8 位自动重新加载定时器模式 比较器 0 或 RTC0 捕获 ( 定时器 2) 比较器 1 或 EXTCLK/8 捕获 ( 定时器 3) silabs.com Smart. Connected. Energy-friendly. Rev

8 EFM8SB2 数据表系统概述 监视程序定时器 (WDT0) 设备包括 PCA0 外围设备中集成的可编程监视程序定时器 (WDT) WDT 溢出将使 MCU 复位 为了避免复位,WDT 必须在溢出之前由应用软件重启 如果系统遇到软件或硬件故障阻止软件重启 WDT, 则 WDT 溢出并复位 复位之后,WDT 自动开启并以默认最大时间间隔来运行 WDT 可以按需由系统软件禁用 RSTb 引脚的状态不受此复位的影响 PCA0 外围设备中集成的监视程序定时器具有以下功能 : 可编程超时间隔 从所选 PCA 时钟源运行 任何系统复位之后自动启动 3.6 通信和其他数字外围设备 通用异步接收器 / 发射器 (UART0) UART0 是一个异步 全双工串口, 它提供标准 8051 UART 的模式 1 和 3 增强的波特率支持允许各种时钟源来生成标准波特率 接收数据缓冲机制允许 UART0 在软件尚未读取前一个数据字节的情况下开始接收第二个输入数据字节 UART 模块提供以下功能 : 异步发射和接收 波特率高达 SYSCLK/2( 发射 ) 或 SYSCLK/8( 接收 ) 8 位或 9 位数据 自动启动和停止发生 发射和接收端的单字节 FIFO 串行外围设备接口 (SPI0 和 SPI1) 串行外围设备接口 (SPI) 模块可以访问灵活的全双工同步串行总线 SPI 可作为主设备或从属设备在 3 线或 4 线模式下运行, 支持单个 SPI 总线上的多个主设备或从属设备 从选择 (NSS) 信号可配置为输入, 以在从模式中选择 SPI, 或在多主环境中禁用主模式操作, 以避免多个主设备试图同时进行数据传输时发生 SPI 总线冲突 NSS 可以在主模式中配置为固件控制的片选输出, 或被禁用以减少所需引脚的数量 在主模式中, 可以用其它通用端口 I/O 引脚选择多个从属设备 SPI 模块包括以下功能 : 支持 3 线或 4 线主模式或从模式运行 在主模式下支持的外部时钟频率为 SYSCLK 2 分频, 从模式下为 SYSCLK 10 分频 支持四种时钟相位及极性选项 8 位专用时钟的时钟频率发生器 支持同一数据线上的多主模式 系统管理总线 / I2C (SMB0) SMBus I/O 接口是一个二线的双向串行总线 SMBus 完全符合系统管理总线规范 1.1 版, 并与 I 2 C 串行总线兼容 SMBus 模块包括以下功能 : 标准 ( 最高 100 kbps) 和快速 (400 kbps) 传输速度 支持主 从和多主模式 多主模式的硬件同步和仲裁 时钟低延长 ( 时钟拉伸 ) 以连接到较快的主模式 硬件支持 7 位从模式和一般调用地址识别 固件支持 10 位从地址解码 能够阻止所有从状态 可编程数据建立 / 保持时间 silabs.com Smart. Connected. Energy-friendly. Rev

9 EFM8SB2 数据表系统概述 外部存储器接口 (EMIF0) 外部存储器接口 (EMIF) 允许访问连接到 GPIO 端口的片外存储器和存储器映射的设备 使用带有 8 位或 16 位目标地址的外部传送指令 (MOVX) 来访问外部存储器空间 支持访问多路复用器内存 四种外部内存模式 : 仅限内部 不带存储体选择的分离模式 带有存储体选择的分离模式 仅限外部 可配置 ALE( 地址锁存允许 ) 定时 可配置地址建立和保持时间 可配置读写脉宽 16/32 位 CRC (CRC0) 循环冗余校验 (CRC) 模块使用 16 位或 32 位多项式执行 CRC CRC0 接受 8 位数据流并将结果存入内部寄存器中 除了使用 CRC 模块对数据进行操作外, 硬件也可以对设备的闪存内容自动执行 CRC CRC 模块可以为闪存验证和通信协议进行硬件计算 CRC 模块包括以下功能 : 支持 CCITT-16 多项式 (0x1021) 支持 CRC-32 多项式 (0x04C11DB7) 字节级位序颠倒 对一个或多个 1024 字节块上的闪存内容自动执行 CRC 初始种子选择为 0x0000/0x 或 0xFFFF/0xFFFFFFFF 3.7 模拟 可编程参考电流 (IREF0) 可编程电流参考 (IREF0) 模块可以开启电流输出或输入, 配有两种输出电流设置 : 低功耗模式和高电流模式 低功耗模式下最大电流输出是 63 µa(1 µa 级 ), 高电流模式下最大电流输出是 504 µa(8 µa 级 ) IREF 模块包括以下功能 : 可以编程来实现输出或输入电流 两种运行模式 : 低功耗模式和高电流模式 10 位 AD 转换器 (ADC0) ADC 是一款逐次逼近寄存器 (SAR) ADC, 具有 10 和 8 位模式, 集成了跟踪保持电路和可编程窗口检测器 该 ADC 可完全在软件控制下通过几个寄存器来配置 ADC 可通过使用模拟多路复用器配置, 以测量各种不同信号 ADC 的电压参考可在内部和外部参考源之间选择 高达 22 的外部输入 单端 10 位模式 所支持的输出更新速率为每秒 300 ksps 样本 在低功耗模式下运行时具有较低的转换速度 异步硬件转换触发器, 可以在软件 外部 I/O 和内部定时器来源之间选择 输出数据窗口比较器允许自动范围检查 支持突发模式, 各转换启动触发器生成一组累计数据并具有可编程的加电稳定和跟踪时间 支持转换完成和窗口比较中断 灵活的输出数据格式 包括内部 1.65 V 快速稳定参考并支持外部参考 集成温度传感器 silabs.com Smart. Connected. Energy-friendly. Rev

10 EFM8SB2 数据表系统概述 低电流比较器 (CMP0, CMP1) 模拟比较器用于比较两种模拟输入的电压, 其中数字输出显示两者之中较高的输入电压 设备 I/O 引脚的外部输入连接以及内部连接可通过正负输入端上彼此独立的多路复用器来启用 滞后 响应时间和电流消耗可进行编程, 以适应应用的特定需求 比较器模块包括下列功能 : 最多 12 次外部正输入 最多 11 次外部负输入 附加输入选项 : 电容感测比较器输出 VDD VDD 除以 2 内部连接到 LDO 输出 直接连接到 GND 同步和异步输出可以通过交叉开关被路由至引脚 可编程滞后位于 0 和 ±20 mv 之间 可编程响应时间 在上升沿 下降沿或这两者中都可以生成中断 3.8 复位源 复位电路允许很容易地将控制器置于一个预定义的缺省状态 在进入此复位状态时, 将发生以下过程 : 内核停止程序执行 如果位复位不是仅使用加电复位, 模块寄存器被初始化为指定的复位值 外部端口引脚被置于已知状态 中断和定时器被禁用 如果位复位不是仅使用加电复位, 则所有寄存器都被复位为寄存器说明中备注的预定义值 在复位期间 RAM 的内容不受影响 ; 之前存储的数据在断电之前保持不变 端口 I/O 锁存器在开路漏极模式下复位为 1 在复位期间和复位之后弱上拉启用 对于电源监视器和加电复位,RSTb 引脚被驱动为低电平, 直到设备退出复位状态 在退出复位状态时, 程序计数器 (PC) 被复位, 并且系统时钟默认为内部振荡器 监视程序定时器被启用, 从位置 0x0000 开始程序执行 设备上的复位源包括以下功能 : 加电复位 外部复位引脚 比较器复位 软件触发复位 电源监控器复位 ( 监控器 VDD 电源 ) 监视程序定时器复位 时钟丢失检测器复位 闪存错误复位 RTC0 警报或振荡器故障 3.9 调试 EFM8SB2 设备包括一个片上 Silicon Labs 2 线 (C2) 调试接口, 支持闪存编程和使用安装在终端应用中的生产件进行系统内调试 C2 接口使用一个时钟信号 (C2CK) 和一个双向 C2 数据信号 (C2D) 在设备和主机系统之间传输信息 有关 C2 协议的详细信息, 请参见 C2 接口规范 silabs.com Smart. Connected. Energy-friendly. Rev

11 EFM8SB2 数据表系统概述 3.10 引导装载程序 所有设备都配备预编程的 UART0 引导装载程序 此引导装载程序位于代码安全页, 即闪存的最后一页 ; 不需要时可以擦除 锁定字节的前一个字节是引导装载程序签名字节 如果此字节的值设为 0xA5 则表示系统中存在引导装载程序 该位置出现任何其他值都表示闪存中没有引导装载程序 存在引导装载程序时, 设备将在执行任何复位操作后, 跳转至引导装载程序向量, 允许运行引导装载程序 随后, 引导装载程序将确定设备是应该停留在引导装载模式中, 还是跳转至位于 0x0000 的复位向量 不存在引导装载程序时, 设备将在执行任何复位操作后, 跳转至 0x0000 的复位向量 欲了解关于引导装载程序协议和使用率的更多信息, 请参见 AN945:EFM8 工厂引导装载程序用户指南 欲了解应用说明, 请参见 Silicon Labs 网站 ( 或通过 [ 应用说明 ] 方块访问 Simplicity Studio 0xFFFF Reserved 0xFBFF Lock Byte 0xFBFE 0xFBFD 0xF800 Bootloader Signature Byte Security Page 1024 Bytes Bootloader Bootloader Vector 63 KB Flash (63 x 1024 Byte pages) 0x0000 Reset Vector 0x03FF 0x0000 Scratchpad 1024 Bytes Figure 3.2. 带引导装载程序的闪存映射 64 kb 设备 silabs.com Smart. Connected. Energy-friendly. Rev

12 EFM8SB2 数据表电气规格 4. 电气规格 4.1 电气特性 除非另有说明, 各表中的所有电气参数都适用于 Table 4.1 Recommended Operating Conditions on page 11( 第 11 页表 4.1 推荐操作条件 ) 中所列的条件 建议的工作条件 Table 4.1. Recommended Operating Conditions Parameter Symbol Test Condition Min Typ Max Unit Operating Supply Voltage on VDD V DD V Minimum RAM Data Retention V RAM Not in Sleep Mode 1.4 V Voltage on VDD 1 Sleep Mode V System Clock Frequency f SYSCLK 0 25 MHz Operating Ambient Temperature T A C Note: 1. All voltages with respect to GND. silabs.com Smart. Connected. Energy-friendly. Rev

13 EFM8SB2 数据表电气规格 功耗 Table 4.2. Power Consumption Parameter Symbol Conditions Min Typ Max Units Digital Supply Current Normal Mode supply current - Full speed with code executing from flash 3, 4, 5 I DD V DD = V, f SYSCLK = 24.5 MHz V DD = V, f SYSCLK = 20 MHz ma 3.5 ma V DD = V, f SYSCLK = khz 90 µa Normal Mode supply current I DDFREQ V DD = V, T = 25 C, frequency sensitivity 1, 3, 5 f SYSCLK < 14 MHz V DD = V, T = 25 C, f SYSCLK > 14 MHz 226 µa/mhz 120 µa/mhz Idle Mode supply current - Core halted with peripherals running 4, 6 I DD V DD = V, f SYSCLK = 24.5 MHz V DD = V, f SYSCLK = 20 MHz V DD = V, f SYSCLK = khz ma 1.8 ma 84 µa Idle Mode Supply Current I DDFREQ V DD = V, T = 25 C 95 µa/mhz Frequency Sensitivity 1,6 Suspend Mode Supply Current I DD V DD = V 77 µa Sleep Mode Supply Current with RTC running from khz crystal I DD 1.8 V, T = 25 C 0.60 µa 3.6 V, T = 25 C 0.85 µa 1.8 V, T = 85 C 1.30 µa 3.6 V, T = 85 C 1.90 µa Sleep Mode Supply Current (RTC off) I DD 1.8 V, T = 25 C 0.05 µa 3.6 V, T = 25 C 0.12 µa 1.8 V, T = 85 C 0.75 µa 3.6 V, T = 85 C 1.20 µa V DD Monitor Supply Current I VMON 7 µa Oscillator Supply Current I HFOSC0 25 C 300 µa ADC0 Always-on Power Supply I ADC 300 ksps Current 7 V DD = 3.0 V Tracking 800 µa 680 µa V DD = 3.0 V silabs.com Smart. Connected. Energy-friendly. Rev

14 EFM8SB2 数据表电气规格 Parameter Symbol Conditions Min Typ Max Units Comparator 0 (CMP0) Supply Current I CMP CPMD = µa CPMD = µa CPMD = µa CPMD = µa Internal Fast-settling 1.65V I VREFFS 200 µa ADC0 Reference, Always-on 8 On-chip Precision Reference I VREFP 15 µa Temp sensor Supply Current I TSENSE 35 µa Programmable Current Reference I IREF Current Source, Either Power (IREF0) Supply Current 9 Mode, Any Output Code Low Power Mode, Current Sink 10 µa 1 µa IREF0DAT = Low Power Mode, Current Sink 11 µa IREF0DAT = High Current Mode, Current Sink 12 µa IREF0DAT = High Current Mode, Current Sink 81 µa Note: IREF0DAT = Based on device characterization data; Not production tested. 2. SYSCLK must be at least 32 khz to enable debugging. 3. Digital Supply Current depends upon the particular code being executed. The values in this table are obtained with the CPU executing an sjmp $ loop, which is the compiled form of a while(1) loop in C. One iteration requires 3 CPU clock cycles, and the flash memory is read on each cycle. The supply current will vary slightly based on the physical location of the sjmp instruction and the number of flash address lines that toggle as a result. In the worst case, current can increase by up to 30% if the sjmp loop straddles a 128-byte flash address boundary (e.g., 0x007F to 0x0080). Real-world code with larger loops and longer linear sequences will have few transitions across the 128-byte address boundaries. 4. Includes supply current from regulator and oscillator source (24.5 MHz high-frequency oscillator, 20 MHz low-power oscillator, or khz RTC oscillator). 5. IDD can be estimated for frequencies < 10 MHz by simply multiplying the frequency of interest by the frequency sensitivity number for that range, then adding an offset of 90 µa. When using these numbers to estimate I DD for > 10 MHz, the estimate should be the current at 25 MHz minus the difference in current indicated by the frequency sensitivity number. For example: V DD = 3.0 V; F = 20 MHz, I DD = 4.1 ma (25 MHz 20 MHz) x ma/mhz = 3.5 ma assuming the same oscillator setting. 6. Idle IDD can be estimated by taking the current at 25 MHz minus the difference in current indicated by the frequency sensitivity number. For example: V DD = 3.0 V; F = 5 MHz, Idle I DD = 2.5 ma (25 MHz 5 MHz) x ma/mhz = 0.6 ma. 7. ADC0 always-on power excludes internal reference supply current. 8. The internal reference is enabled as-needed when operating the ADC in burst mode to save power. 9. IREF0 supply current only. Does not include current sourced or sunk from IREF0 output pin. silabs.com Smart. Connected. Energy-friendly. Rev

15 EFM8SB2 数据表电气规格 复位和电源监控器 Table 4.3. Reset and Supply Monitor Parameter Symbol Test Condition Min Typ Max Unit VDD Supply Monitor Threshold V VDDM Reset Trigger V V WARN Early Warning V VDD Supply Monitor Turn-On Time t MON 300 ns Power-On Reset (POR) Monitor Threshold V POR Initial Power-On (Rising Voltage on V DD ) 0.75 V Falling Voltage on V DD V Brownout Recovery (Rising Voltage on V DD ) 0.95 V V DD Ramp Time t RMP Time to V DD 1.8 V 3 ms Reset Delay from POR t POR Relative to V DD > V POR ms Reset Delay t RST Time between release of reset source and code execution 10 µs RST Low Time to Generate Reset t RSTL 15 µs Missing Clock Detector Response Time (final rising edge to reset) Missing Clock Detector Trigger Frequency t MCD F SYSCLK > 1 MHz µs F MCD 7 10 khz 闪存 Table 4.4. Flash Memory Parameter Symbol Test Condition Min Typ Max Units Write Time 1 t WRITE One Byte µs Erase Time 1 t ERASE One Page ms Endurance (Write/Erase Cycles) N WE 1 k 30 k Cycles Note: 1. Does not include sequencing time before and after the write/erase operation, which may be multiple SYSCLK cycles. 2. Data Retention Information is published in the Quarterly Quality and Reliability Report. silabs.com Smart. Connected. Energy-friendly. Rev

16 EFM8SB2 数据表电气规格 电源管理定时 Table 4.5. Power Management Timing Parameter Symbol Test Condition Min Typ Max Units Idle Mode Wake-up Time t IDLEWK 2 3 SYSCLKs Suspend Mode Wake-up Time t SUSPENDWK CLKDIV = 0x ns Precision Osc. CLKDIV = 0x µs Low Power Osc. Sleep Mode Wake-up Time t SLEEPWK 2 µs 内部振荡器 Table 4.6. Internal Oscillators Parameter Symbol Test Condition Min Typ Max Unit High Frequency Oscillator 0 (24.5 MHz) Oscillator Frequency f HFOSC0 Full Temperature and Supply Range MHz Low Power Oscillator (20 MHz) Oscillator Frequency f LPOSC Full Temperature and Supply Range MHz RTC in Self-Oscillate Mode Oscillator Frequency f LFOSC Bias Off 12 ± 5 khz Bias On 25 ± 10 khz 晶体振荡器 Table 4.7. Crystal Oscillator Parameter Symbol Test Condition Min Typ Max Unit Crystal Frequency f XTAL MHz silabs.com Smart. Connected. Energy-friendly. Rev

17 EFM8SB2 数据表电气规格 外部时钟输入 Table 4.8. External Clock Input Parameter Symbol Test Condition Min Typ Max Unit External Input CMOS Clock f CMOS 0 25 MHz Frequency (at EXTCLK pin) External Input CMOS Clock High Time External Input CMOS Clock Low Time t CMOSH 18 ns t CMOSL 18 ns silabs.com Smart. Connected. Energy-friendly. Rev

18 EFM8SB2 数据表电气规格 ADC Table 4.9. ADC Parameter Symbol Test Condition Min Typ Max Unit Resolution N bits 10 Bits Throughput Rate f S 300 ksps Tracking Time t TRK 1.5 µs Power-On Time t PWR 1.5 µs SAR Clock Frequency f SAR High Speed Mode, 8.33 MHz Conversion Time T CNV 13 Clocks Sample/Hold Capacitor C SAR Gain = 1 30 pf Gain = pf Input Pin Capacitance C IN 20 pf Input Mux Impedance R MUX 5 kω Voltage Reference Range V REF 1 V DD V Input Voltage Range 1 V IN Gain = 1 0 V REF V Gain = x V REF V Power Supply Rejection Ratio PSRR ADC Internal High Speed VREF 67 db External VREF 74 db DC Performance Integral Nonlinearity INL ±0.5 ±1 LSB Differential Nonlinearity (Guaranteed Monotonic) DNL ±0.5 ±1 LSB Offset Error E OFF VREF = 1.65 V LSB Offset Temperature Coefficient TC OFF LSB/ C Slope Error E M ±0.06 ±0.24 % Dynamic Performance 10 khz Sine Wave Input 1dB below full scale, Max throughput Signal-to-Noise SNR db Signal-to-Noise Plus Distortion SNDR db Total Harmonic Distortion (Up to 5th Harmonic) THD -73 db Spurious-Free Dynamic Range SFDR 75 db Note: 1. Absolute input pin voltage is limited by the V DD supply. silabs.com Smart. Connected. Energy-friendly. Rev

19 EFM8SB2 数据表电气规格 参考电压 Table Voltage References Parameter Symbol Test Condition Min Typ Max Unit Internal Fast Settling Reference Output Voltage V REFFS V Temperature Coefficient TC REFFS 50 ppm/ C Turn-on Time t VREFFS 1.5 µs Power Supply Rejection PSRR REFFS 400 ppm/v On-chip Precision Reference Output Voltage V REFP V Turn-on Time, settling to 0.5 LSB t VREFP 4.7 µf tantalum µf ceramic bypass on VREF pin 0.1 µf ceramic bypass on VREF pin 15 ms 300 µs No bypass on VREF pin 25 µs Load Regulation LR VREFP Load = 0 to 200 µa to GND 400 µv / µa Short-circuit current ISC VREFP 3.5 ma Power Supply Rejection PSRR VREFP 140 ppm/v External Reference Input Voltage V EXTREF 1 V DD V Input Current I EXTREF Sample Rate = 300 ksps; VREF = 3.0 V 5.25 µa 温度传感器 Table Temperature Sensor Parameter Symbol Test Condition Min Typ Max Unit Offset V OFF T A = 0 C 940 mv Offset Error 1 E OFF T A = 0 C 18 mv Slope M 3.40 mv/ C Slope Error 1 E M 40 µv/ C Linearity ±1 C Turn-on Time t PWR 1.8 µs Note: 1. Represents one standard deviation from the mean. silabs.com Smart. Connected. Energy-friendly. Rev

20 EFM8SB2 数据表电气规格 比较器 Table Comparators Parameter Symbol Test Condition Min Typ Max Unit Response Time, CPMD = 00 (Highest Speed) Response Time, CPMD = 11 (Lowest Power) Positive Hysterisis Mode 0 (CPMD = 00) t RESP mv Differential 120 ns 100 mv Differential 110 ns t RESP mv Differential 1.25 µs 100 mv Differential 3.2 µs HYS CP+ CPHYP = mv CPHYP = 01 8 mv CPHYP = mv CPHYP = mv Negative Hysterisis Mode 0 (CPMD = 00) HYS CP- CPHYN = mv CPHYN = 01 8 mv CPHYN = mv CPHYN = mv Positive Hysterisis Mode 1 (CPMD = 01) HYS CP+ CPHYP = mv CPHYP = 01 6 mv CPHYP = mv CPHYP = mv Negative Hysterisis Mode 1 (CPMD = 01) HYS CP- CPHYN = mv CPHYN = 01 6 mv CPHYN = mv CPHYN = mv Positive Hysterisis Mode 2 (CPMD = 10) HYS CP+ CPHYP = mv CPHYP = mv CPHYP = 10 9 mv CPHYP = mv Negative Hysterisis Mode 2 (CPMD = 10) HYS CP- CPHYN = mv CPHYN = mv CPHYN = 10 9 mv CPHYN = mv Positive Hysteresis Mode 3 (CPMD = 11) HYS CP+ CPHYP = mv CPHYP = 01 4 mv CPHYP = 10 8 mv CPHYP = mv silabs.com Smart. Connected. Energy-friendly. Rev

21 EFM8SB2 数据表电气规格 Parameter Symbol Test Condition Min Typ Max Unit Negative Hysteresis Mode 3 (CPMD = 11) HYS CP- CPHYN = mv CPHYN = 01 4 mv CPHYN = 10 8 mv CPHYN = mv Input Range (CP+ or CP ) V IN V DD V Input Pin Capacitance C CP 12 pf Common-Mode Rejection Ratio CMRR CP 70 db Power Supply Rejection Ratio PSRR CP 72 db Input Offset Voltage V OFF T A = 25 C mv Input Offset Tempco TC OFF 3.5 µv/ C 可编程参考电流 (IREF0) Table Programmable Current Reference (IREF0) Parameter Symbol Conditions Min Typ Max Units Static Performance Resolution N bits 6 bits Output Compliance Range V IOUT Low Power Mode, Source 0 V DD 0.4 High Current Mode, Source 0 V DD 0.8 V V Low Power Mode, Sink 0.3 V DD V High Current Mode, Sink 0.8 V DD V Integral Nonlinearity INL <±0.2 ±1.0 LSB Differential Nonlinearity DNL <±0.2 ±1.0 LSB Offset Error E OFF <±0.1 ±0.5 LSB Full Scale Error E FS Low Power Mode, Source ±5 % High Current Mode, Source ±6 % Low Power Mode, Sink ±8 % High Current Mode, Sink ±8 % Absolute Current Error E ABS Low Power Mode Sourcing 20 µa <±1 ±3 % Dynamic Performance Output Settling Time to 1/2 LSB t SETTLE 300 ns Startup Time t PWR 1 µs Note: 1. The PCA block may be used to improve IREF0 resolution by PWMing the two LSBs. silabs.com Smart. Connected. Energy-friendly. Rev

22 EFM8SB2 数据表电气规格 端口 I/O Table Port I/O Parameter Symbol Test Condition Min Typ Max Unit Output High Voltage (High V OH I OH = 3 ma V DD 0.7 V Drive) 1 Output Low Voltage (High V OL I OL = 8.5 ma 0.6 V Drive) 1 Output High Voltage (Low V OH I OH = 1 ma V DD 0.7 V Drive) 1 Output Low Voltage (Low Drive) 1 V OL I OL = 1.4 ma 0.6 V Input High Voltage V IH V DD = 2.0 to 3.6 V V DD 0.6 V V DD = 1.8 to 2.0 V 0.7 x V DD V Input Low Voltage V IL V DD = 2.0 to 3.6 V 0.6 V V DD = 1.8 to 2.0 V 0.3 x V DD V Weak Pull-Up Current I PU V DD = 1.8 V 4 µa V IN = 0 V V DD = 3.6 V µa V IN = 0 V Input Leakage I LK Weak pullup disabled or pin in analog mode 1 1 µa Note: 1. See Figure 4.2 常见 V OH 曲线 on page 23 and Figure 4.3 常见 V OL 曲线 on page 24 for more information. 4.2 热能条件 Table Thermal Conditions Parameter Symbol Test Condition Min Typ Max Unit Thermal Resistance 1 θ JA QFN-24 Packages 35 C/W QFN-32 Packages 28 C/W QFP-32 Packages 80 C/W Note: 1. Thermal resistance assumes a multi-layer PCB with any exposed pad soldered to a PCB pad. silabs.com Smart. Connected. Energy-friendly. Rev

23 EFM8SB2 数据表电气规格 4.3 绝对最大额定值 超过 Table 4.16 Absolute Maximum Ratings on page 22( 第 20 页表 4.17 最大额定值 ) 中所列的应力值可能会永久损坏设备 这仅为应力额定值, 不表示在此值之下或在此规范的操作列表中标明的额定值之上的任何其他条件下可以对设备进行功能性操作 长期在最大额定值条件下工作可影响设备的可靠性 有关质量参数和可靠性数据的更多信息, 请访问 quality/pages/default.aspx 参阅 质量和可靠性监视报告 Table Absolute Maximum Ratings Parameter Symbol Test Condition Min Max Unit Ambient Temperature Under Bias T BIAS C Storage Temperature T STG C Voltage on V DD V DD GND V Voltage on I/O pins or RSTb V IN V DD > 2.2 V GND V V DD <= 2.2 V GND 0.3 V DD V Total Current Sunk into Supply Pin I VDD 400 ma Total Current Sourced out of Ground Pin Current Sourced or Sunk by Any I/O Pin or RSTb Maximum Total Current through all Port Pins I GND 400 ma I IO ma I IOTOT 200 ma Operating Junction Temperature T J C Exposure to maximum rating conditions for extended periods may affect device reliability. silabs.com Smart. Connected. Energy-friendly. Rev

24 EFM8SB2 数据表电气规格 4.4 典型性能曲线 Figure 4.1. 常见工作电流 ( 全电源电压范围 ) Figure 4.2. 常见 V OH 曲线 silabs.com Smart. Connected. Energy-friendly. Rev

25 EFM8SB2 数据表电气规格 Figure 4.3. 常见 V OL 曲线 silabs.com Smart. Connected. Energy-friendly. Rev

26 EFM8SB2 数据表典型连接图 5. 典型连接图 5.1 电源 Figure 5.1 电源连接图 on page 25 显示 EFM8SB2 设备电源引脚的典型连接图 1 µf and 0.1 µf bypass capacitors required for the power pins placed as close to the pins as possible V (in) VDD EFM8SB2 Device GND Figure 5.1. 电源连接图 5.2 调试 下图为调试连接引脚的典型连接图 仅在 C2D( 一种 GPIO 引脚 ) 和 C2CK (RSTb) 路由到外部电路的情况下, 才要求引脚共享电阻 例如, 如果 RSTb 引脚连接到带有消抖滤波器的外部开关, 或者与 C2D 引脚共享的 GPIO 连接到外部电路, 则引脚共享电阻和调试适配器连接必须放置在硬件 否则, 这些元件和连接可能被忽略 欲了解关于调试连接的更多信息, 请参见 AN127: C2 接口的引脚共享技术 中的示例原理图和可用信息 欲了解应用说明, 请参见 Silicon Labs 网站 ( 或 Simplicity Studio EFM8SB2 Device VDD 1 k External System C2CK 1 k 1 k (if pin sharing) C2D (if pin sharing) 1 k 1 k GND Debug Adapter Figure 5.2. 调试连接图 silabs.com Smart. Connected. Energy-friendly. Rev

27 EFM8SB2 数据表典型连接图 5.3 其他连接 其他元件或连接可能需要满足系统级要求 应用说明 AN203:8 位 MCU 印刷电路板设计说明 中对这些连接进行了详细说明 应用说明位于 Silicon Labs 网站上 ( silabs.com Smart. Connected. Energy-friendly. Rev

28 EFM8SB2 数据表引脚定义 6. 引脚定义 6.1 EFM8SB2x-QFN32 引脚定义 N/C 1 24 P1.0 GND 2 23 P1.1 VDD 3 22 P1.2 N/C N/C pin QFN (Top View) P1.3 P1.4 RSTb / C2CK 6 19 P1.5 P2.7 / C2D 7 18 P1.6 P2.6 P1.7 XTAL4 XTAL3 P2.5 P2.4 P2.3 P2.2 P2.1 P P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 GND Figure 6.1. EFM8SB2x-QFN32 插脚 Table 6.1. Pin Definitions for EFM8SB2x-QFN32 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 1 N/C No Connection silabs.com Smart. Connected. Energy-friendly. Rev

29 EFM8SB2 数据表引脚定义 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 2 GND Ground 3 VDD Supply Power Input 4 N/C No Connection 5 N/C No Connection 6 RSTb / C2CK 7 P2.7 / C2D Active-low Reset / C2 Debug Clock Multifunction I/O / C2 Debug Data 8 P2.6 Multifunction I/O Yes EMIF_WRb ADC0.22 CMP0P.11 CMP1P.11 9 XTAL4 RTC Crystal XTAL4 10 XTAL3 RTC Crystal XTAL3 11 P2.5 Multifunction I/O Yes EMIF_RDb ADC0.21 CMP0N.10 CMP1N P2.4 Multifunction I/O Yes EMIF_ALE ADC0.20 CMP0P.10 CMP1P P2.3 Multifunction I/O Yes EMIF_A11 ADC0.19 CMP0N.9 CMP1N.9 14 P2.2 Multifunction I/O Yes EMIF_A10 ADC0.18 CMP0P.9 CMP1P.9 15 P2.1 Multifunction I/O Yes EMIF_A9 ADC0.17 CMP0N.8 CMP1N.8 16 P2.0 Multifunction I/O Yes EMIF_A8 ADC0.16 CMP0P.8 CMP1P.8 17 P1.7 Multifunction I/O Yes P1MAT.7 EMIF_AD7 ADC0.15 CMP0N.7 CMP1N.7 silabs.com Smart. Connected. Energy-friendly. Rev

30 EFM8SB2 数据表引脚定义 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 18 P1.6 Multifunction I/O Yes P1MAT.6 EMIF_AD6 ADC0.14 CMP0P.7 CMP1P.7 19 P1.5 Multifunction I/O Yes P1MAT.5 EMIF_AD5 ADC0.13 CMP0N.6 CMP1N.6 20 P1.4 Multifunction I/O Yes P1MAT.4 EMIF_AD4 ADC0.12 CMP0P.6 CMP1P.6 21 P1.3 Multifunction I/O Yes P1MAT.3 SPI1_NSS EMIF_AD3 22 P1.2 Multifunction I/O Yes P1MAT.2 SPI1_MOSI EMIF_AD2 23 P1.1 Multifunction I/O Yes P1MAT.1 SPI1_MISO EMIF_AD1 24 P1.0 Multifunction I/O Yes P1MAT.0 SPI1_SCK EMIF_AD0 25 P0.7 Multifunction I/O Yes P0MAT.7 INT0.7 INT1.7 ADC0.11 CMP0N.5 CMP1N.5 ADC0.10 CMP0P.5 CMP1P.5 ADC0.9 CMP0N.4 CMP1N.4 ADC0.8 CMP0P.4 CMP1P.4 ADC0.7 IREF0 CMP0N.3 CMP1N.3 26 P0.6 Multifunction I/O Yes P0MAT.6 CNVSTR INT0.6 ADC0.6 CMP0P.3 CMP1P.3 INT P0.5 Multifunction I/O Yes P0MAT.5 INT0.5 INT P0.4 Multifunction I/O Yes P0MAT.4 INT0.4 INT1.4 ADC0.5 CMP0N.2 CMP1N.2 ADC0.4 CMP0P.2 CMP1P.2 silabs.com Smart. Connected. Energy-friendly. Rev

31 EFM8SB2 数据表引脚定义 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 29 P0.3 Multifunction I/O Yes P0MAT.3 EXTCLK INT0.3 INT P0.2 Multifunction I/O Yes P0MAT.2 INT0.2 INT1.2 ADC0.3 XTAL2 CMP0N.1 CMP1N.1 ADC0.2 CMP0P.1 CMP1P.1 XTAL1 31 P0.1 Multifunction I/O Yes P0MAT.1 INT0.1 INT1.1 ADC0.1 AGND CMP0N.0 CMP1N.0 32 P0.0 Multifunction I/O Yes P0MAT.0 INT0.0 INT1.0 ADC0.0 CMP0P.0 CMP1P.0 VREF Center GND Ground silabs.com Smart. Connected. Energy-friendly. Rev

32 EFM8SB2 数据表引脚定义 6.2 EFM8SB2x-QFN24 引脚定义 N/C 1 18 P0.6 GND 2 17 P0.7 VDD N/C pin QFN (Top View) P1.0 P1.1 N/C 5 14 P1.2 RSTb / C2CK 6 13 P1.3 P2.7 / C2D XTAL4 XTAL3 P1.6 P1.5 P P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 GND Figure 6.2. EFM8SB2x-QFN24 插脚 Table 6.2. Pin Definitions for EFM8SB2x-QFN24 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 1 N/C No Connection 2 GND Ground 3 VDD Supply Power Input 4 N/C No Connection 5 N/C No Connection silabs.com Smart. Connected. Energy-friendly. Rev

33 EFM8SB2 数据表引脚定义 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 6 RSTb / C2CK 7 P2.7 / C2D Active-low Reset / C2 Debug Clock Multifunction I/O / C2 Debug Data 8 XTAL4 RTC Crystal XTAL4 9 XTAL3 RTC Crystal XTAL3 10 P1.6 Multifunction I/O Yes ADC0.14 CMP0P.7 CMP1P.7 11 P1.5 Multifunction I/O Yes P1MAT.5 ADC0.13 CMP0N.6 CMP1N.6 12 P1.4 Multifunction I/O Yes P1MAT.4 ADC0.12 CMP0P.6 CMP1P.6 13 P1.3 Multifunction I/O Yes P1MAT.3 SPI1_NSS ADC0.11 CMP0N.5 CMP1N.5 14 P1.2 Multifunction I/O Yes P1MAT.2 SPI1_MOSI ADC0.10 CMP0P.5 CMP1P.5 15 P1.1 Multifunction I/O Yes P1MAT.1 SPI1_MISO ADC0.9 CMP0N.4 CMP1N.4 16 P1.0 Multifunction I/O Yes P1MAT.0 SPI1_SCK ADC0.8 CMP0P.4 CMP1P.4 17 P0.7 Multifunction I/O Yes P0MAT.7 INT0.7 INT1.7 ADC0.7 IREF0 CMP0N.3 CMP1N.3 18 P0.6 Multifunction I/O Yes P0MAT.6 CNVSTR INT0.6 ADC0.6 CMP0P.3 CMP1P.3 INT1.6 silabs.com Smart. Connected. Energy-friendly. Rev

34 EFM8SB2 数据表引脚定义 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 19 P0.5 Multifunction I/O Yes P0MAT.5 INT0.5 INT P0.4 Multifunction I/O Yes P0MAT.4 INT0.4 INT P0.3 Multifunction I/O Yes P0MAT.3 EXTCLK INT0.3 INT P0.2 Multifunction I/O Yes P0MAT.2 INT0.2 INT1.2 ADC0.5 CMP0N.2 CMP1N.2 ADC0.4 CMP0P.2 CMP1P.2 ADC0.3 XTAL2 CMP0N.1 CMP1N.1 ADC0.2 CMP0P.1 CMP1P.1 XTAL1 23 P0.1 Multifunction I/O Yes P0MAT.1 INT0.1 INT1.1 ADC0.1 AGND CMP0N.0 CMP1N.0 24 P0.0 Multifunction I/O Yes P0MAT.0 INT0.0 INT1.0 ADC0.0 CMP0P.0 CMP1P.0 VREF Center GND Ground silabs.com Smart. Connected. Energy-friendly. Rev

35 EFM8SB2 数据表引脚定义 6.3 EFM8SB2x-QFP32 引脚定义 N/C 24 P1.0 GND 23 P1.1 VDD 22 P1.2 N/C N/C 32 Pin QFP P1.3 P1.4 RSTb / C2CK 19 P1.5 P2.7 / C2D 18 P1.6 P P1.7 XTAL4 XTAL3 P2.5 P2.4 P2.3 P2.2 P2.1 P2.0 P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P Figure 6.3. EFM8SB2x-QFP32 插脚 Table 6.3. Pin Definitions for EFM8SB2x-QFP32 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 1 N/C No Connection 2 GND Ground 3 VDD Supply Power Input 4 N/C No Connection 5 N/C No Connection 6 RSTb / C2CK 7 P2.7 / C2D Active-low Reset / C2 Debug Clock Multifunction I/O / C2 Debug Data silabs.com Smart. Connected. Energy-friendly. Rev

36 EFM8SB2 数据表引脚定义 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 8 P2.6 Multifunction I/O Yes EMIF_WRb ADC0.22 CMP0P.11 CMP1P.11 9 XTAL4 RTC Crystal XTAL4 10 XTAL3 RTC Crystal XTAL3 11 P2.5 Multifunction I/O Yes EMIF_RDb ADC0.21 CMP0N.10 CMP1N P2.4 Multifunction I/O Yes EMIF_ALE ADC0.20 CMP0P.10 CMP1P P2.3 Multifunction I/O Yes EMIF_A11 ADC0.19 CMP0N.9 CMP1N.9 14 P2.2 Multifunction I/O Yes EMIF_A10 ADC0.18 CMP0P.9 CMP1P.9 15 P2.1 Multifunction I/O Yes EMIF_A9 ADC0.17 CMP0N.8 CMP1N.8 16 P2.0 Multifunction I/O Yes EMIF_A8 ADC0.16 CMP0P.8 CMP1P.8 17 P1.7 Multifunction I/O Yes P1MAT.7 EMIF_AD7 ADC0.15 CMP0N.7 CMP1N.7 18 P1.6 Multifunction I/O Yes P1MAT.6 EMIF_AD6 ADC0.14 CMP0P.7 CMP1P.7 19 P1.5 Multifunction I/O Yes P1MAT.5 EMIF_AD5 ADC0.13 CMP0N.6 CMP1N.6 20 P1.4 Multifunction I/O Yes P1MAT.4 EMIF_AD4 ADC0.12 CMP0P.6 CMP1P.6 silabs.com Smart. Connected. Energy-friendly. Rev

37 EFM8SB2 数据表引脚定义 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 21 P1.3 Multifunction I/O Yes P1MAT.3 SPI1_NSS EMIF_AD3 22 P1.2 Multifunction I/O Yes P1MAT.2 SPI1_MOSI EMIF_AD2 23 P1.1 Multifunction I/O Yes P1MAT.1 SPI1_MISO EMIF_AD1 24 P1.0 Multifunction I/O Yes P1MAT.0 SPI1_SCK EMIF_AD0 25 P0.7 Multifunction I/O Yes P0MAT.7 INT0.7 INT1.7 ADC0.11 CMP0N.5 CMP1N.5 ADC0.10 CMP0P.5 CMP1P.5 ADC0.9 CMP0N.4 CMP1N.4 ADC0.8 CMP0P.4 CMP1P.4 ADC0.7 IREF0 CMP0N.3 CMP1N.3 26 P0.6 Multifunction I/O Yes P0MAT.6 CNVSTR INT0.6 ADC0.6 CMP0P.3 CMP1P.3 INT P0.5 Multifunction I/O Yes P0MAT.5 INT0.5 INT P0.4 Multifunction I/O Yes P0MAT.4 INT0.4 INT P0.3 Multifunction I/O Yes P0MAT.3 EXTCLK INT0.3 INT P0.2 Multifunction I/O Yes P0MAT.2 INT0.2 INT1.2 ADC0.5 CMP0N.2 CMP1N.2 ADC0.4 CMP0P.2 CMP1P.2 ADC0.3 XTAL2 CMP0N.1 CMP1N.1 ADC0.2 CMP0P.1 CMP1P.1 XTAL1 silabs.com Smart. Connected. Energy-friendly. Rev

38 EFM8SB2 数据表引脚定义 Pin Number Pin Name Description Crossbar Capability Additional Digital Functions Analog Functions 31 P0.1 Multifunction I/O Yes P0MAT.1 INT0.1 INT1.1 ADC0.1 AGND CMP0N.0 CMP1N.0 32 P0.0 Multifunction I/O Yes P0MAT.0 INT0.0 INT1.0 ADC0.0 CMP0P.0 CMP1P.0 VREF silabs.com Smart. Connected. Energy-friendly. Rev

39 EFM8SB2 数据表 QFN32 封装规格 7. QFN32 封装规格 7.1 QFN32 封装尺寸 Figure 7.1. QFN32 封装图 Table 7.1. QFN32 Package Dimensions Dimension Min Typ Max A A b D 5.00 BSC D e E 0.50 BSC 5.00 BSC E L silabs.com Smart. Connected. Energy-friendly. Rev

40 EFM8SB2 数据表 QFN32 封装规格 Dimension Min Typ Max L aaa 0.15 bbb 0.10 ddd 0.05 eee 0.08 Note: 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. Dimensioning and Tolerancing per ANSI Y14.5M This drawing conforms to JEDEC Solid State Outline MO-220, variation VHHD except for custom features D2, E2, and L which are toleranced per supplier designation. 4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components. silabs.com Smart. Connected. Energy-friendly. Rev

41 EFM8SB2 数据表 QFN32 封装规格 7.2 QFN32 PCB 焊盘布局 Figure 7.2. QFN32 PCB 焊盘布局图 Table 7.2. QFN32 PCB Land Pattern Dimensions Dimension Min Max C C E 0.50 BSC X X Y Y silabs.com Smart. Connected. Energy-friendly. Rev

42 EFM8SB2 数据表 QFN32 封装规格 Dimension Min Max Note: 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. This Land Pattern Design is based on the IPC-7351 guidelines. 3. All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder mask and the metal pad is to be 60 µm minimum, all the way around the pad. 4. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release. 5. The stencil thickness should be mm (5 mils). 6. The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads. 7. A 3 x 3 array of 1.0 mm x 1.0 mm openings on a 1.2 mm pitch should be used for the center pad. 8. A No-Clean, Type-3 solder paste is recommended. 9. The recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components. 7.3 QFN32 封装标识 EFM8 PPPPPPPP TTTTTT YYWW # Figure 7.3. QFN32 封装标识 封装标识的组成为 : PPPPPPPP 指定部件编号 TTTTTT 跟踪或生产代码 YY 生产年份的最后 2 位数字 WW 设备生产时的 2 位工作周 # 设备版本 (A B 等 ) silabs.com Smart. Connected. Energy-friendly. Rev

43 EFM8SB2 数据表 QFN24 封装规格 8. QFN24 封装规格 8.1 QFN24 封装尺寸 Figure 8.1. QFN24 封装图 Table 8.1. QFN24 Package Dimensions Dimension Min Typ Max A A b D 4.00 BSC D e E 0.50 BSC 4.00 BSC E L L aaa 0.15 silabs.com Smart. Connected. Energy-friendly. Rev

44 EFM8SB2 数据表 QFN24 封装规格 Dimension Min Typ Max bbb 0.10 ddd 0.05 eee 0.08 Z 0.24 Y 0.18 Note: 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. Dimensioning and Tolerancing per ANSI Y14.5M This drawing conforms to JEDEC Solid State Outline MO-220, variation WGGD except for custom features D2, E2, Z, Y, and L which are toleranced per supplier designation. 4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components. silabs.com Smart. Connected. Energy-friendly. Rev

45 EFM8SB2 数据表 QFN24 封装规格 8.2 QFN24 PCB 焊盘布局 Figure 8.2. QFN24 PCB 焊盘布局图 Table 8.2. QFN24 PCB Land Pattern Dimensions Dimension Min Max C C E 0.50 BSC X X Y Y silabs.com Smart. Connected. Energy-friendly. Rev

46 EFM8SB2 数据表 QFN24 封装规格 Dimension Min Max Note: 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. This Land Pattern Design is based on the IPC-7351 guidelines. 3. All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder mask and the metal pad is to be 60 µm minimum, all the way around the pad. 4. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release. 5. The stencil thickness should be mm (5 mils). 6. The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads. 7. A 2 x 2 array of 1.10 mm x 1.10 mm openings on 1.30 mm pitch should be used for the center ground pad. 8. A No-Clean, Type-3 solder paste is recommended. 9. The recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components. 8.3 QFN24 封装标识 PPPPPPPP TTTTTT YYWW # Figure 8.3. QFN24 封装标识 封装标识的组成为 : PPPPPPPP 指定部件编号 TTTTTT 跟踪或生产代码 YY 生产年份的最后 2 位数字 WW 设备生产时的 2 位工作周 # 设备版本 (A B 等 ) silabs.com Smart. Connected. Energy-friendly. Rev

47 EFM8SB2 数据表 QFP32 封装规格 9. QFP32 封装规格 9.1 QFP32 封装尺寸 Figure 9.1. QFP32 封装图 Table 9.1. QFP32 Package Dimensions Dimension Min Typ Max A 1.60 A A b D D1 e E 9.00 BSC 7.00 BSC 0.80 BSC 9.00 BSC silabs.com Smart. Connected. Energy-friendly. Rev

48 EFM8SB2 数据表 QFP32 封装规格 Dimension Min Typ Max E BSC L aaa 0.20 bbb 0.20 ccc 0.10 ddd 0.20 theta Note: 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. Dimensioning and Tolerancing per ANSI Y14.5M This drawing conforms to JEDEC outline MS-026, variation BBA. 4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components. silabs.com Smart. Connected. Energy-friendly. Rev

49 EFM8SB2 数据表 QFP32 封装规格 9.2 QFP32 PCB 焊盘布局 Figure 9.2. QFP32 PCB 焊盘布局图 Table 9.2. QFP32 PCB Land Pattern Dimensions Dimension Min Max C C E 0.80 BSC X Y Note: 1. All dimensions shown are in millimeters (mm) unless otherwise noted. 2. This Land Pattern Design is based on the IPC-7351 guidelines. 3. All metal pads are to be non-solder mask defined (NSMD). Clearance between the solder mask and the metal pad is to be 60 µm minimum, all the way around the pad. 4. A stainless steel, laser-cut and electro-polished stencil with trapezoidal walls should be used to assure good solder paste release. 5. The stencil thickness should be mm (5 mils). 6. The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads. 7. A No-Clean, Type-3 solder paste is recommended. 8. The recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components. silabs.com Smart. Connected. Energy-friendly. Rev

50 EFM8SB2 数据表 QFP32 封装规格 9.3 QFP32 封装标识 EFM8 PPPPPPPP TTTTTT YYWW # Figure 9.3. QFP32 封装标识 封装标识的组成为 : PPPPPPPP 指定部件编号 TTTTTT 跟踪或生产代码 YY 生产年份的最后 2 位数字 WW 设备生产时的 2 位工作周 # 设备版本 (A B 等 ) silabs.com Smart. Connected. Energy-friendly. Rev

51 EFM8SB2 数据表版本历史 10. 版本历史 10.1 版本 1.2 已将订购部件编号更新至修订版 B 已添加来自 POR 规格的复位延迟 已将 I/O 5 V 电压耐受添加至 1. 功能列表 已将关于引导装载程序的信息添加至 3.10 引导装载程序 已将调试典型连接图添加至 5. 典型连接图 已将参考添加至 3.1 介绍中的参考手册 10.2 版本 1.1 首次发行 silabs.com Smart. Connected. Energy-friendly. Rev

52 目录 1. 功能列表 订购信息 系统概述 介绍 电源 I/O 时钟 定时器 / 计数器和 PWM 通信和其他数字外围设备 模拟 复位源 调试 引导装载程序 电气规格 电气特性 建议的工作条件 功耗 复位和电源监控器 闪存 电源管理定时 内部振荡器 晶体振荡器 外部时钟输入 ADC 参考电压 温度传感器 比较器 可编程参考电流 (IREF0) 端口 I/O 热能条件 绝对最大额定值 典型性能曲线 典型连接图 电源 调试 其他连接 引脚定义 EFM8SB2x-QFN32 引脚定义 目录 51

53 6.2 EFM8SB2x-QFN24 引脚定义 EFM8SB2x-QFP32 引脚定义 QFN32 封装规格 QFN32 封装尺寸 QFN32 PCB 焊盘布局 QFN32 封装标识 QFN24 封装规格 QFN24 封装尺寸 QFN24 PCB 焊盘布局 QFN24 封装标识 QFP32 封装规格 QFP32 封装尺寸 QFP32 PCB 焊盘布局 QFP32 封装标识 版本历史 版本 版本 目录 目录 52

54 Simplicity Studio One-click access to MCU and wireless tools, documentation, software, source code libraries & more. Available for Windows, Mac and Linux! IoT Portfolio SW/HW Quality Support and Community community.silabs.com Disclaimer Silicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Labs reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. Silicon Labs shall have no liability for the consequences of use of the information supplied herein. This document does not imply or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products are not designed or authorized to be used within any Life Support System without the specific written consent of Silicon Labs. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death. Silicon Labs products are not designed or authorized for military applications. Silicon Labs products shall under no circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons. Trademark Information Silicon Laboratories Inc., Silicon Laboratories, Silicon Labs, SiLabs and the Silicon Labs logo, Bluegiga, Bluegiga Logo, Clockbuilder, CMEMS, DSPLL, EFM, EFM32, EFR, Ember, Energy Micro, Energy Micro logo and combinations thereof, "the world s most energy friendly microcontrollers", Ember, EZLink, EZRadio, EZRadioPRO, Gecko, ISOmodem, Precision32, ProSLIC, Simplicity Studio, SiPHY, Telegesis, the Telegesis Logo, USBXpress and others are trademarks or registered trademarks of Silicon Labs. ARM, CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of ARM Holdings. Keil is a registered trademark of ARM Limited. All other products or brand names mentioned herein are trademarks of their respective holders. Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX USA

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