User Guide

Technical Documentation
NHD–4
System Module
P.A.M.S
Page 4–12
Original 11/97
AUDIO Block
Table 8. Audio Block Connections
Signal Name Type Notes
VA2 IN Analog supply voltage 1. Max 80 mA.
PCMIN IN Received audio in PCM–format
CODEC_FS IN frame sync
CODEC_MCLK IN codec main clock
CODEC_DIN IN Audio codec control data
CODEC_CLK IN Clock for audio codec control data transfer
XCODEC_CS IN Audio codec chip select
HFMIC IN External microphone
MICN, MICP IN Differential microphone signal
PCMOUT OUT Transmitted audio in PCM–format
CODEC_DO OUT Audio codec control data
MIC_EN OUT Microphone enable
EXTEAR OUT External received audio
EARN, EARP OUT Internal received audio
External Signals and Connections
Table 9. List of Connectors
Connector Name Notes
User Interface Connector 30 pin ZIF for Flex
System Connector Acc., Charging, Test connector.
User Interface Connector
Table 10. UIF Connector
Signal Name Pin / Conn. Notes
VL1 1 Logic supply voltage
GND 2, 29 Ground
VBAT 3, 30 Battery voltage
BACKLIGHT 4 Backlights on/off
UIF(0:6) 5 – 11 Lines for keyboard write and LCD–controller
control
MIC_EN 12 Microphone bias enable
COL(0:3) 13 – 16 Lines for keyboard read
CALL_LED 17 Call led enable
MICP 18 Microphone (positive node)