After Sales Technical Documentation THX–4 Series Transceiver Chapter 5 DISPLAY MODULE Original, 09/94
THX–4 Display Module After Sales Technical Documentation CHAPTER 5 – DISPLAY MODULE CONTENTS Page No Introduction 5–3 Technical Specifications 5–3 External Connectors 5–3 Display Module Connector J2 5–3 Side Volume Connector J2 5–4 Functional Description 5–4 Circuit Description 5–4 General 5–4 Display Driver 5–4 Display Driver D1 Signals 5–5 Side Volume Connector 5–5 Supply Voltages and Power Consumption 5–5 List of Figures Figure 1: LCD/Driver Circuit Diagram 5–7 Figure 2: LCD P
After Sales THX–4 Technical Documentation Display Module 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.
After Sales THX–4 Technical Documentation Display Module Side Volume Connector J2 The side Volume Keys are connected to the main LCD flexi, J2. Name Description ROW0 Keyboard input line to system module COL2 Keyboard output line to system module ROW1 Keyboard input line to system module COL3 Keyboard output line to system module Functional Description Circuit Description General The Display Module consists of one IC, a display and LED backlighting.
After Sales THX–4 Technical Documentation Display Module Display Driver D1 Signals Pin Name Description D0/S1 SDA Serial data from radio module D1/P/_S Parallel/serial selection D2/CAE Chip address enable D3/SO Serial Data out (not used) SYNC Synchronous (grounded) SCK Serial Clock Data clock for serial data C/D C_XD Command/data input CA0,CA1 CS Chip address XLCDEN Chip select RESET Reset signal input CLOCK External clock input BUSY XBUSY Busy signal output VLC1–5 LCD dri
After Sales THX–4 Technical Documentation Display Module The supply voltage for the backlighting LEDs is provided by the VBAT line (J2/5) and is available when the battery is connected. Typical current/voltage consumption values for the module are as follows: Power Status I/VL2 I/VBAT Power off 0 mA 0 mA Power on without lighting 1.5 mA 0 mA Power on with lighting 1.5 mA 40 mA Pin Minimum VL2 Maximum +5 V VBAT +5.25 V +6 V +9V Pin Minimum Typical Maximum VL2 1.1 mA 1.7 mA 1.
