User Guide

After Sales
Technical Documentation
Display
THA–4S
Page 5–3
Original, 12/95
Introduction
The Display Module controls the operation of the display and backlighting.
The Display Module is controlled by the System Module.
Technical Specifications
External Connectors
The Display Module is provided with 18 connections to the System
Module.
Display Module Connector J2
Pin Name Description
1 ROW1 Keyboard input line to system module
2 COL0 Keyboard output line from system module
3 ROW0 Keyboard input line to system module
4 COL3 Keyboard output from system module
5 VBAT Supply voltage for lighting (+6V nominal)
6 LCD_LIGHTS Backlight on/off control from system module
7 LCD_CLOCK Clock signal to display module
8 LCD_RES Display driver reset signal from system mod-
ule
9 XLCDEN Display driver chip select from system mod-
ule
10 C_XD Display driver command/data line from sys-
tem module
11 SCL Display driver data clock from display mod-
ule
12 VL2 +4.8V supply voltage to display module
13 XBUSY LCD driver busy signal to system module
14 0V Ground
15 SDA Display driver data line from system module
16 V_LCD Negative supply (nom. –2.2V) to display
driver
17 EARP Not used
18 EARM Not used