4.Absolute maximum ratings
Item
Symbol
Standard
Unit
Power voltage VDD-VSS
0 - 7.0
V
Input voltage VIN
VSS - VDD
Operating temperature range VOP
-20 - +70
-30 - +80
℃
Storage temperature range VST
5.Block diagram
6.Interface pin description
Pin no.
Symbol
External
connection
Function
1 GND
2 VDD Power supply for logic (+3.3V) for LCM Power supply
Signal ground for LCM (GND)
3 V0 Contrast adjust
4 RS MPU Register select signal
5 R/W MPU Read/write select signal
6 E MPU Operation (data read/write) enable signal
7~10 DB0~DB3 MPU
Four low order bi-directional three-state data bus lines.
Used for data transfer between the MPU and the LCM.
These four are not used during 4-bit operation.
11~14 DB4~DB7 MPU
Four high order bi-directional three-state data bus lines.
Used for data transfer between the MPU
15 LED+ LED BKL power
16 LED- Power supply for BKL supply
Power supply for BKL