Acionamento do display LCD, com uso de interface I2C.
Modelo HMS0903AL
Conector do display:
1 – SDA (sem pull up)
2 – SCL (sem pull up)
3 – VDD (+5v)
4 – VSS
5 – +backlight (+5v)
6 – -backlight (GND)
o controlador do painel LCD é o PCF8576CT.
Para a configuração do display, segundo o datasheet do PCF8576:
START
70h address
E0h device select
CDh mode set
FBh bank select
F0h blink select
00h pointer to data, reset pointer
220d HELLO
62d
20d
20d
120d
STOP