User guide

Arch Meter Corporation PS1000 Ver1.2
PS1000Rev. 1.2 May 2006
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www.archmeter.com
User can set the LCD display data at the LCD buffer from LCD0 ~ LCD19. The
LCD controller will automatic load the LCD0~LCD19 data and display on the
LCD screen. The LCD controller also has one LCD bias circuit. It can generate the
LCD bias for the COM and SEG driving. User can change the bias voltage for 1/2,
1/3 or 1/4 bias control. Here is the bias circuit block diagram.
VLCD
V1
V2
V3
VSS
LCD
Driver
Control
LCD
Driver
SEG0
COM0
…
SEG39
…
LCDEN
VR
R
R
R
R: 5K ~ 25K
VCC