CLM920_AC3 Module Hardware Usage Guide
Shanghai Yuge Information Technology co., LTD
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Contents
2.1 Module introduction......................................................................................................- 3 -
2.2 Module characteristics.................................................................................................. - 3 -
2.3 Module function............................................................................................................- 5 -
3.1 Chapter overview..........................................................................................................- 7 -
3.2 Module interface........................................................................................................... - 8 -
3.2.1 Module pin distribution.......................................................................................... - 8 -
3.2.2 Pin definition.......................................................................................................... - 9 -
3.3.1 Power supply design.............................................................................................- 16 -
3.3.2 Power reference circuit.........................................................................................- 17 -
3.3.3 VDD_EXT Voltage output................................................................................... - 19 -
3.4.1 Module boot......................................................................................................... - 19 -
3.4.2 Boot timing...........................................................................................................- 20 -
3.4.3 Module shutdown................................................................................................. - 21 -
3.4.4 Reset control.........................................................................................................- 22 -
3.5 USB interface..............................................................................................................- 24 -
3.6 UART interface...........................................................................................................- 25 -
3.6.1 Main serial port.....................................................................................................- 25 -
3.6.2 Debug serial port.................................................................................................. - 27 -
3.6.3 RI Signal interface................................................................................................- 27 -
3.7.1 USIM card reference circuit................................................................................. - 29 -
3.7.2 USIM_ PRESENCE Hot Swap Reference Design...............................................- 30 -
3.8 General purpose GPIO interface.................................................................................- 31 -
3.9 Status indication interface...........................................................................................- 32 -
3.10 PCM digital voice interface (under developing).......................................................- 33 -
3.11 I2C bus (under developing).......................................................................................- 35 -
