User's Manual

4.3 Current Draw........................................................................................................................................15
4.4 Inputs/Outputs Logic Levels ..............................................................................................................15
4.5 Output Power .......................................................................................................................................16
4.6 Audio Interface.....................................................................................................................................16
4.6.1 PCM Audio....................................................................................................................................16
4.6.1.1 MSM Timing Parameters....................................................................................................... 16
4.6.1.2 PCM Sync Timing .................................................................................................................. 16
4.6.1.3 MSM Receive Timing.............................................................................................................17
4.6.1.4 MSM Transmitting Timing...................................................................................................... 17
4.6.2 UART Data Interface..................................................................................................................... 17
4.6.3 Cellular Antenna Open/Short Sense............................................................................................. 19
4.6.4 I/O Interface Circuit Diagrams.......................................................................................................20