MTK平台的参考设计电路以及解析

bjohn

MTK GSM Clam Shell
Reference Design Circuit Analysis
MTK GSM Clam Shell................................................................................ 1
Reference Design Circuit Analysis............................. 1
Revision History ................................................................................................................................................... 2
Specification ......................................................................................................................................................... 4
Transceiver introduction ..................................................................................................................................... 7
2.1 General Descriptions..................................................................................................................................... 8
3 RF Circuit Description....................................................................................................................................... 9
3.1 The front end................................................................................................................................................. 9
3.2 Receiver ............................................................................................................................................... 10
3.3 Transmitter ........................................................................................................................................... 10
3.4 RF Frequency Synthesizer .................................................................................................................... 11
3.4.1 Synthesizer System Description...................................................................................................... 11
3.4.2 Synthesizer Frequency Programming for Rx Mode......................................................................... 12
3.4.3 Synthesizer Frequency Programming for Tx Mode ......................................................................... 12
3.5 26MHz and AFC control circuit .............................................................................................................. 14
3.6 TXVCO and PA Circuit .......................................................................................................................... 14
3.7 Regulator .............................................................................................................................................. 15
Pin Assignment and Description ....................................................................................................................... 22
4 Circuit Description.................................................................................................................................... 24
4.1 Base Band overview............................................................................................................................. 24
4.2 External Memory Interface..................................................................................................................... 24
4.3 User Interface ....................................................................................................................................... 25
4.4 Audio Interface ..................................................................................................................................... 30
4.5 Radio Interface ..................................................................................................................................... 31
4.6 Debug Function .................................................................................................................................... 32
4.7 Power Management.............................................................................................................................. 32
4.8 MT6305 Power Management System overview .................................................................................... 32
4.9 YAMAHA YMU762C Melody ................................................................................................................. 37
4.10 Hall Sensor IC ...................................................................................................................................... 38
4.11 Auxiliary ADC Unit ................................................................................................................................ 38

jacklz

weishenmebushimianfeide?

camfence

看看，谢谢