User Guide

PAMS
Technical Documentation
UI Module UE4S
Page 4–7
Original 03/98
The LCD Module Interface
Pin Line
Symbol
Parameter Mini-
mum
Typical
/ Nomi-
nal
Maxi-
mum
Unit Notes
1 VL Supply voltage 2.7 2.8 2.85 V
300 uA
2 SCLK Serial clock input 0 4.0 MHz VBB = 2.7V
0 VBB V
3 SDA Serial data input 0 0.3xVBB
0.7xVBB VBB
4 LCDCDX Control/display data flag input 0 0.3xVBB Control
0.7xVBB VBB Data
5 LCDCSX Chip select input 0 0.3xVBB Active
0.7xVBB VBB
6 OSC** External clock for LCD 30.4 32.0 33.6 kHz Connected to
VBB on UI
7 UDGND* Ground 0 V
8 VOUT DC/DC voltage converter output 9
9 LCDRSTX Reset 0 0.3xVBB Active
0.7xVBB VBB
* Ground position is on connector NOT BATTERY.
** External oscillator is not used in UE4S.
Display Driver
19
Viewing trought LCD cell
LCD Module Interface