Nokia 2180 Manual Do Serviço

PAMS

Technical Documentation

NHD–4

Uif   Module

Page 6–4

Original 11/97

1

GND

Ground

2,3

OSC1, OSC2

Oscillation  terminals

4–8

V1–V5

LCD driving power source

9

V5OUT

Negative voltage converter output

10–11

C1, C2

4.7 uF capacitor to generate negative
voltage for the input voltage VCI

12

VCI

Power source for voltage converter

13

VCC

Power source

14

RS

Register selection

15

R/W

Read/write

16

EN

Enable for read/write signal

17–20

D(0–3)

Data bus

21–24

D(4–7)

Data bus

The module is connected with a 30 pin flex connector to the system board
and a 24 pin connector to the LCD module.

The module includes following  main blocks:

 

– Keyboard

 

– 

I

llumination

 

– Audio block

 

– LCD Module interface