User Guide

Technical Documentation
NHP–4
Uif Module
PAMS
Page 5–3
Issue 1 04/99
External Signals and Connections
Table 1. To Radio Module
Signal Name Pin / Conn. Notes
VL1 1 Logic supply voltage 3.15V
GND 2 Ground
V
BATT
3, 30 Battery voltage
BACKLIGHT 4 Backlights on/off
UIF(0:6) 5 – 11 Lines for keyboard read and LCD–controller
control
MIC_ENA 12 Microphone bias enable
COL(0:3) 13 – 16 Lines for keyboard write
CALL_LED 17 Call led enable
MICP 18 Microphone (positive node)
MICN 19 Microphone (negative node)
EARP 20 Earpiece (positive node)
EARN 21 Earpiece (negative node)
BUZZER 22 PWM signal buzzer control
XPWRON 23 Power key (active low)
VA2 24 Analog supply voltage 3.15V
NC 25,27,28
V
LCD
26 Supply voltage 4.0V for the LCD driver
AGND 29 Analog ground for the microphone
KEY
BOARD
BUZZER
DISPLAY
DISPLAY
DRIVER
POWER
ON/OFF
MIC
EAR
UIF
Connector
Figure 1. UIF Interconnection Diagram