GM47/GM48 INTEGRATOR’S MANUAL

2.7 PCM Digital Audio

Pin

Signal

Dir

Function

 

 

 

 

52

PCMCLK

O

PCM clock

 

 

 

 

51

PCMSYNC

O

PCM frame sync

 

 

 

 

47

PCMULD

I

PCM audio input to DSP

 

 

 

 

48

PCMDLD

O

PCM audio output from DSP

 

 

 

 

50

PCMIN

I

PCM audio input to Codec

 

 

 

 

49

PCMOUT

O

PCM audio output to Codec

 

 

 

 

Figure 2.4 shows the PCM (Pulse Code Modulation) digital audio connection for external devices. These connections can be used to process PCM digital audio signals, bypassing the module’s internal analogue audio CODEC.

DSP

GM47

 

 

PCMSYNC & PCMCLK

 

PCMDLD

PCMIN

CODEC

 

 

PCMULD

PCMOUT

 

System connector

 

Link for internal digital-audio processing

Analogue audio signals

Figure 2.4 Pin connections to digital audio

Note! When no external audio processing is performed, the following pins must be connected together:

PCMDLD to PCMIN

PCMULD to PCMOUT

Electrical characteristics

Digital 2.75V CMOS input/output electrical characteristics apply.

52

LZT 123 7263 R1C

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Sony Ericsson GM48, GM47 manual PCM Digital Audio, Pcmdld to Pcmin Pcmuld to Pcmout, Electrical characteristics