Technical data

SYSTEM CONNECTOR INTERFACE

LZT 123 8020 R1A

5.8 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 5.6 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

radio device’s internal analogue audio CODEC.

Figure 5.6 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 2.75 V CMOS input/output electrical characteristics

apply.