Audio Control; Pcm Serial Interface - Nokia NSB-6 Series Technical Documentation Manual

PAMS Technical Documentation

Audio control

PCM serial interface

The interface consists of following signals: a PCM codec master clock
(PCMDClk), a frame synchronization signal to DSP (PCMSClk), a codec
transmit data line (PCMTX) and a codec receive data line (PCMRX). The
COBBA–GJP generates the PCMDClk clock, which is supplied to DSP
SIO. The COBBA–GJP also generates the PCMSClk signal to DSP by di-
viding the PCMDClk. The PCMDClk frequency is 512 kHz. PCMSClk fre-
quency is 8.0 kHz.
PCMDClk
PCMSClk
PCMTxData
PCMRxData
Issue 1 06/2000
sign extended MSB
15 14 13 12
sign extended MSB
E Nokia Mobile Phones Ltd.
System Module
11 10
NSB–6
LSB
0
LSB
Page 25