User Guide

NSB-5
System Module PAMS Technical Documentation
Page 90 Nokia Mobile Phones Ltd. Issue 1 03/01
UI Module Connection to Main PCB
Table 46: Module interface
Pin Signal Symbol Parameter Minimum
Typical/
Nominal
Maxim
um
Unit/Notes
1Temp
sensor
Temperature at LCD for com-
pensation of contrast and
brightness. Reference to GND.
47 kΩ NTC
resistor
@25
o
C)
Note: Not
used in
HD955
2 LDCDCX tsas
tsah
Control/display data flag input 150
150
low
HIGH
ns/Setup
time
ns/Hold
time
Control
data
Display
data
3 SPKR_p Speaker connection 150
4 LCDCSX tcss
tcsh
Chip select input, active low
150
0.7xVDD
0.2xVD
D
ns
ns
V/HIGH
V/LOW
5SCL
tscyc
tshw
tslw
Serial clock input 0
250
100
100
3.250 MHz/
VDD=2.7V
ns
ns
ns
6 SPKR_n Speaker connection
7ON/
OFF_key
ON/OFF key connection. Refer-
enced to GND
0VDDV
8 LED- LED negative connection 60 mA
9 LED+ LED positive connection 60 mA
10 ESD-
GND
GND GND 0 V
11 G ND GND G ND 0 V
12 VDD Supply voltage 2.7
100
2.8 3.3
200
V
uA/nomi-
nal supply
volt., text
on display
@ 25
o
C
13 SDA tsds
tsdh
Serial data input
100 ns