Primary Pcm - SimCom SIM5218E Hardware Design

SIM5218E Hardware Design

3.19.2 Primary PCM

The aux codec port also supports 2.048 MHz PCM data and sync timing for υ-law codecs that
match the sync timing — this is called the primary PCM interface (or just PCM interface).
You can use AT+CPCM command to change the mode you want.
Figure 32：PRIM_PCM_CODEC to SIM5218E timing
Figure 33：SIM5218E to PRIM_PCM_CODEC timing
Table 31 : PIM_PCM_CODEC timing parameters
Parameter Description
t(sync) PCM_SYNC cycle time
SIM5218E_HD_V1.03
Figure 31：PRIM_PCM_SYNC timing
52
Min Typical Max
– 125 –
11.06.2009
Unit Note
μs