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2 Version Revision V0.5 Date 2009/08/27 Initial release Comments

3 MT6612 Key Features Package Support 5mm x 5mm 40-lead (0.5mm pitch) QFN 3.01mm x 3.06mm 45-ball (0.4mm pitch) WLCSP. General Support BT3.0 and BT 2.1+ EDR spec. Class-1 (9dBm) TX power with integrated PA. Support USB 2.0 full speed interface for laptop and computer peripherals. Platform Integrated LDO allows directly connect to V BAT. Standard 2-Wire and 1-Wire PTA interface for MTK WiFi chips co-existence. Applications Mobile Handset and Smartphone Portable Navigation Devices (PND) Laptop and Notebook Computer Peripherals Application Block Diagram Handset application BT IC MT6612 VBAT BT_PWR_EN UART/HCI PCM GPIO PTA Battery MTK BB IC MTK WiFi

5 MTK Bluetooth Total Solution MTK BT Reference Design Bluetooth MP Built-in MTK BT SW Bluetooth BQE Factory Test Tool

6 MT6612 Reference Schematic Need no external LDO, can directly applied from VBAT! Integrated Regulator Compact BOM & Layout Area Reserved for external clock application MTK qualified component Reserved for external clock selection. - pull-high for external clock - pull-low for crystal Reserved for external clock input

7 MT6612 Interface MT5921 MT6612 LDO28_EN UART T/Rx MTK BB BT_ACT GPIO4 EINT Reset PCM SRCLKENA SRCLKENAI OSC In EINT/GPIO Dash line path is only for AD6548 share clock 26MHz MTK RF VCXOEN

8 MT6612 Reference Design Power Protection For MT6223,35,38,53 For MT6225 Because VBAT is directly applied, battery voltage protection should be applied: Design notice in Phone side: 1. Add 22uF capacitor. 2. Add Zener diode (5.6V) to protect the IC against low frequency voltage surge. Put it between battery connector and MT6612. Notice: If using IO connector or test point to supply VBAT for download, manufacture, or repair, should let VBAT trace passing zener diode and 22uF capacitor before entering IC. Notice: Using 5.6V zener will introduce some leakage when VBAT = 4.2V. ex. 5.6V zener CZRU52C5V6, will have extra 5uA leakage. Design notice in Power Supply side: Add 1000uF (or above) capacitor at the output of the power supply to reduce the voltage bounce caused by long power cable. And the power cable should be as short as possible. Also add 1000uF (or above) capacitor at the end of power cable (near phone side).

9 Baseband GPIO Assignment for MT6612 (1/2) BT/Baseband Interface assignment In the BT/BB interface assign phase, the GPIO should be arranged carefully. Do not use GPIO with conflict power domain (for example, camera power domain).

10 Baseband GPIO Assignment for MT6612 (2/2) Reserve the default (hardware) pull-down GPIO to LDO28EN pin to avoid unwanted leakage. Bit GPIO +0400h GPIO pull-up/pull-down select register 1 Name GPIO15 GPIO14 GPIO13 GPIO12 GPIO11 GPIO10 GPIO9 GPIO8 GPIO7 GPIO6 GPIO5 GPIO4 GPIO3 GPIO2 GPIO1 GPIO0 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset : Default (after reset state) is pulled-down GPIO +0440h GPIO pull-up/pull-down select register 2 Bit Name GPIO31 GPIO30 GPIO29 GPIO28 GPIO27 GPIO26 GPIO25 GPIO24 GPIO23 GPIO22 GPIO21 PGIO20 GPIO19 GPIO18 GPIO17 GPIO16 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset Reference assignment Do not use 1: Default (after reset state) is pulled-high MT6611 MT6238 MT6235 MT6223 MT6229 Notes LDO28EN GPIO29 GPIO39 GPIO30 GPIO9 Do not use pulled-up GPIO! EXT32K GPIO77 GPIO27 GPIO21 GPIO36

11 MT6612 PTA Interface MT6612 can support 1-wire PTA interconnection for MTK WiFi coexistence. MT6612 s GPIO for PTA MTK 1-Wire Standard 2-Wire GPIO4 V V GPIO5 V For MTK WiFi chip: MT6612 GPIO4 MT5921 BT_ACT For non-mtk WiFi: MT6612 GPIO4 GPIO5 Non MTK WiFi BT_ACT WiFi_ACT

Balance port routing should be symmetrical and shorter than 2mm, while

12 Reference Layout (1/3) RF/Analog part: Using qualified balance filter, need no external matching network. Balance port routing should be symmetrical and shorter than 2mm, while the single-end trace route should keep 50. Keep out the ground area of crystal. 50Ohm Symmetrical and Smaller than 2mm

Reference Layout (2/3) Power rail part: Low cost through-hole process can be adopted. Make star-connection at C23 for 2.8V power trace. Also, starconnected at C51 for 1.2V trace route.

13 Reference Layout (2/3) Power rail part: Low cost through-hole process can be adopted. Make star-connection at C23 for 2.8V power trace. Also, starconnected at C51 for 1.2V trace route. Provide complete ground for power traces, do not route power traces in parallel with or crossing to digital or strong disturbance signals. C32 C31 Component side Top layer Signal Layer 2nd layer Ground plane 3rd layer Power traces Bottom layer 1.2V 2.8V C51 C23

14 Reference Layout (3/3) Digital part: The 32k trace MUST be shielded by ground along the routing. DO NOT place any other trace along with it. 26MHz trace should be shielded by ground from BT to GSM BB and RF when co-clock mechanism is employed. (detailed please refer to MT6612 co-clock application note) DO NOT let strong disturbance signal trace across or parallel to BT digital line, especially for BT_URXD3, BT_UTXD3, PCMCLK, PCMSYNC, PCMIN, PCMOUT.

15 BT Antenna Design and Placement Place the BT antenna at the corner of the PCB. The feed point is directly connected to the antenna. Reserve enough distance between the antenna, ground and the shielding case. Ground blue screw holes, and don t ground red screw holes. Feed point Shielding case Good screw hole locations > 3 mm > 3 mm Bad screw hole locations

Shared External Clock AD6548 (1/3) SRCLKENAI MTK qualified X tal for co-clock AD6548 26MHz MTK BB Clock Indication (EINT/GPIO) MTK BT SRCLKENA 1.

17 Shared External Clock AD6548 (1/3) SRCLKENAI MTK qualified X tal for co-clock AD MHz MTK BB Clock Indication (EINT/GPIO) MTK BT SRCLKENA 1. Reserve pull-up and pull-down resistor on ECLKSEL pin to select external or X tal clock. To BB SRCLKENAI and EINT 2. Connect SRCLKENA to BB s SRCLKENAI and EINT/GPIO (please follow the table for reference assignment)

18 Shared External Clock AD6548 (2/3) Assignment for Clock Indication (EINT/GPIO): MT6225 MT6223 MT6235 MT6238 EINT # BB Pin Pin Name IO Power GPIO GPIO GPIO GPIO Edge/Level HW MODE 0 MODE 1 MODE 2 MODE 3 Trigger Debounce EINT4 T3 GPIO0 VDD33 GPIO EINT4 Edge/Level Yes EINT5 U4 GPIO1 VDD33 GPIO EINT5 Edge/Level Yes EINT6 T4 GPIO2 VDD33 GPIO UCTS1 EINT6 Edge/Level Yes EINT7 U5 GPIO3 VDD33 GPIO3 BSI_RFIN URTS1 EINT7 Edge/Level Yes EINT2 C11 EINT2 VDD33 EINT2 GPIO Edge/Level Yes EINT3 D11 EINT3 VDD33 EINT3 GPIO43 MIRQ ---- Edge/Level Yes EINT4 R8 JTRST_B VDD33 JTRST_B GPIO26 EINT Edge/Level Yes EINT5 P8 JTDI VDD33 JTDI GPIO27 EINT Edge/Level Yes EINT6 T9 JTMS VDD33 JTMS GPIO28 EINT Edge/Level Yes EINT7 U14 LCD_CS1_B VDD33_LCD LCD_CS1_B GPIO14 LCD_SCE1_B EINT7 Edge/Level Yes MIRQ D11 EINT3 VDD33 EINT3 GPIO43 MIRQ ---- EINT3 E24 EINT3 VDD33 GPIO44 EINT3 DRF_DATA IRQ2 Edge/Level Yes EINT4 E23 EINT4 VDD33 GPIO45 EINT4 DRF_EN CLKM3 Edge/Level Yes EINT5 D23 EINT5 VDD33 GPIO46 EINT5 EDICK ---- Edge/Level Yes EINT6 D25 EINT6 VDD33 GPIO47 EINT6 EDIWS ---- Edge/Level Yes EINT7 D24 EINT7 VDD33 GPIO48 EINT7 EDIDAT ---- Edge/Level Yes EINT0 T16 EINT0 VDD33_NORM2 GPIO77 EINT0 CLKM Edge/Level Yes EINT1 AB17 EINT1 VDD33_NORM2 GPIO78 EINT1 CLKM Edge/Level Yes EINT2 AC19 EINT2 VDD33_NORM2 GPIO79 EINT2 DSP_GPO3 TBTXEN Edge/Level Yes EINT3 AC25 EINT3 VDD33_NORM2 GPIO33 EINT3 DSP_GPO2 TBTXFS Edge/Level Yes EINT4 AD24 EINT4 VDD33_NORM2 GPIO34 EINT4 DSP_GPO1 TBRXEN Edge/Level Yes EINT5 T17 EINT5 VDD33_NORM2 GPIO35 EINT5 DSP_GPO0 TBRXFS Edge/Level Yes EINT6 AE18 EINT6 VDD33_NORM2 GPIO36 EINT6 EDIWS ---- Edge/Level Yes EINT7 AC20 EINT7 VDD33_NORM2 GPIO37 EINT7 EDIDAT ---- Edge/Level Yes

Shared External Clock AD6548 (3/3) 3. Please also reserve X tal footprint for back-up. MT6612 4.

19 Shared External Clock AD6548 (3/3) 3. Please also reserve X tal footprint for back-up. MT In AD MHz output, reserve LPF footprint and default use 0 connection. From AD MHz 5. Please also reserve clock buffer on 26MHz to BB path, connect buffer power to VTCXO. AD6548 Clock buffer To BB 26MHz From AD MHz PMU

20 Special Notes for AD6548 Co-clock Layout Follow original design rule for OG and BT if not mentioned. BT close to RF transceiver! (Highly recommended) 26MHz trace routing rule As short as possible Good shielding with ground to avoid noise & coupling Transceiver trace routing rule Have VCXO power good decouple and clean ground. Using MTK recommended OG Xtal and clock buffer Reserve BT Xtal footprint

21 Shared External Clock MT6253 (1/2) 26MHz 6253 X tal MT6253 SRCLKENA MT Reserve Xtal footprint for backup. 2. Reserve pull-up and pull-down resistor on ECLKSEL pin to select external or X tal clock. MT6612 Pull-high for external clock Pull-low for XTal selection From MT MHz

22 Shared External Clock MT6253 (2/2) 3. Connect SRCLKENA (clock request) to MT6253 s SRCLKENAI 4. Connect 26MHz output from MT6253 to 6612 via 1nF AC couple capacitor. MT6612 SRCLKENA To MT6253 SRCLKENAI MT6253 To MT MHz

23 Special Notes for MT6253 Co-clock Layout Follow original design rule for MT6253 and BT if not mentioned. BT close to RF transceiver! (Highly recommended) 26MHz trace routing rule As short as possible Good shielding with ground to avoid noise & coupling Using MTK recommended MT6253 Xtal. Reserve BT Xtal footprint

24 Shared External Clock SW Configuration Use Drv tool in Custom folder to configure GPIO, the clock request input should be configured as SRCLKENAI mode.

26 Bluetooth Tool ATE (1/2) ATE tool Used for factory BT RF performance test. Support EDR RF test cases. Support instrument: R&S CMU/CBT, Anritsu 8852B and Agilent N4010A

27 Bluetooth Tool ATE (2/2) Configure the test item in Customer_Setup.txt: `1 Enable Test Item `0 Disable Test Item BT Items = 1,1,1,1,1,0,0,0,0,0,0,1,1,1,1 BT1.2 power, Initial Carrier Frequency, Carrier Frequency Drift, Modulation Character, Single Slot BER,Multi Slot BER, EDR Relative Power, EDR Modulation Accuracy, EDR Differential Phase Encoding, EDR Sensitivity, EDR BER floor, Reserve, Reserve, Reserve, Reserve

28 Bluetooth Tool SN Writer SN Station Can write BD address (Meta mode) PCM Loop back 1 (Normal mode) PCM Loop back 2 (Normal mode) Write BD address

30 MT nd Source List Balance filter Vendor ACX MT6612QFN Qualification List PN FB N2R4M Dimensions (mm) 2.0 x 1.25 x 0.7 WALSIN RFBPB AM1T x 1.2 x 0.9 Cyntec TBB C5 2.0 x 1.25 x 0.4 TDK DEA202450BT-7190A1 2.0 x 1.25 x 0.6 Xtal MT6612QFN X tal Qualification List Vendor PN F 0 (MHz) C load (pf) Dimensions (mm) NDK NX3225SA x 2.5 x 0.55

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