User's Manual

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SC14CVMDECT SF Cordless Voice Module

• 4.608 MHz

• 1.536 MHz

4.12.6 PCM data mode

The PCM interface supports the following PCM data

formats:

• Linear PCM, 8 kHz sample rate.

Used for narrowband calls (G.726).

• Linear PCM, 16 kHz sample rate.

Used for wideband calls (G.722).

• G.711 – A-law, 8 kHz sample rate.

Used for narrowband calls (G.726).

• G.711 – -law, 8 kHz sample rate.

Used for narrowband calls (G.726).

• Compressed wideband using A-law, 16 kHz sample

rate. The 16 bit PCM data is encoded as two 8 bit

audio samples if 8 kHz frame sync is used. Used for

wideband calls (G.722).

• Compressed wideband using -law, 16 kHz sample

rate. The 16 bit PCM data is encoded as two 8 bit

audio samples if 8 kHz frame sync is used. Used for

wideband calls (G.722).

Figure 21 PCM interface formats

Channel 3Channel 3Channel 2Channel 2Channel 1Channel 1Channel 0Channel 0

DSP_PCM_CTRL_REG[5,4,3] = 000

DSP_PCM_CTRL_REG[5,4,3] = 010

DSP_PCM_CTRL_REG[5,4,3] = 100

DSP_PCM_CTRL_REG[5,4,3] = 101

DSP_PCM_CTRL_REG[5,4,3] = 111

DSP_PCM_CTRL_REG[5]=0

DSP_PCM_CTRL_REG[5]=1

PCM Slave mode

D15 D8 D7 D0

PCM Master

DSP_PCM_CTRL_REG[5,4,3] = 001

DSP_PCM_CTRL_REG[5,4,3] = 011

DSP_PCM_CTRL_REG[5,4,3] = 110

PCM_CLK

PCM_DI PCM_DO

PCM_FSC (input)

PCM_FSC