User guide

Arch Meter Corporation PS1000 Ver1.2
PS1000Rev. 1.2 May 2006
55/ 67
www.archmeter.com
12. LCD
The PS1000 has build-in one LCD driver. It can driver one 40x4 LCD panel.
This LCD circuit is controlled by setting the LCDCFG and LCDDIV register.
LCDCFG(0xFE26)
B7 B6 B5 B4 B3 B2 B1 B0
CTRL MODE SEG COM
CTRL: LCD IF Mode Control
00: LCD IF Disable (Default)
01: Test Mode
10: Blank Display
11: RAM Data Display
MODE: LCD Mode Control
00: Bias Mode
01: Static mode
1x: Not define
SEG: LCD Segment Control
00: 10 Segments On
01: 20 Segments On
10: 30 Segments On
11: 40 Segments On
COM: LCD COM Control
00: COM0 Static
01: COM0~COM1 (1/2 Duty)
10: COM0~COM2 (1/3 Duty)
11: COM0~COM3 (1/4 Duty)
LCDDIV
B7 B6 B5 B4 B3 B2 B1 B0
x Divider
Divider: LCD Frame frequency N
Frame Frequency 4*1024/ (duty*N)
Segment Frequency 4*1024/N