User Guide

PAMS
Technical Documentation
NHD–4
Uif Module
Page 6–4
Original 11/97
Table 2. To LCD Module
Pin Signal Name Notes
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
Functional Description
Circuit Description
Main components on the DU8 module
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
 – Illumination
 – Audio block
 – LCD Module interface