Sharp CD-CH1000 - Lcd Display

CD-CH1000
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LCD720: RUNTZ0020AWZZ
LCD DISPLAY
L
R
LCD PANEL
80seg+4com
PCF8533U/2
SA0,A0,A1,A2 connect to VSS
VLCD
VSS
VDD
SCL
SDA
R tr/2Cb
MPU
Recommended Circuit for Contrast adjustment
VDD
R1
VR
R2
VLCD
VSS
R1+VR+R2=20k Ohm
5V
Pin No. Pin Name Connect to DescriptionI/O
1 VLCD Power supply LCD supply voltage
Logic ground
Supply voltage (5V)
I
2
C-bus serial clock input
I
2
C-bus serial data input/output
—
2 VSS Power supply—
3 VDD Power supply—
4 SCL MPUI
5 SDA MPUI/O