Command Definition - BenQ G2420HD Product Service Manual

F. Command definition :
PC Host will send 0x7C IIC slave address and then following 4 bytes command
I2C Send Command
Write Contrast to MCU RAM
Write Brightness to MCU RAM
Write Red Gain to MCU RAM
Write Green Gain to MCU RAM
Write Blue Gain to MCU RAM
Read Contrast from MCU RAM
Read Brightness from MCU RAM
Read Red Gain from MCU RAM by
color index
Read Green Gain from MCU RAM by
color index
Read Blue Gain from MCU RAM by
color index
Write C1 (Bluish) R-Gain Data to
EEPROM
Write C1 (Bluish) G-Gain Data to
EEPROM
Write C1 (Bluish) B-Gain Data to
EEPROM
Write C2 (sRGB) R-Gain Data to
EEPROM
Write C2 (sRGB) G-Gain Data to
EEPROM
Write C2 (sRGB) B-Gain Data to
EEPROM
Write C3 (Reddish) R-Gain Data to
EEPROM
Write C3 (Reddish) G-Gain Data to
EEPROM
Write C3 (Reddish) B-Gain Data to
EEPROM
Write User R-Gain Data to EEPROM
Write User G-Gain Data to EEPROM
Write User B-Gain Data to EEPROM
Byte Byte
Byte1 2 3
CA 55 Data
CA 56 Data
CA 57 Data
CA 58 Data
CA 59 Data
C3 55 XX
C3 56 XX
C3 57 XX
C3 58 XX
C3 59 XX
AA 3C Data
AA 3D Data
AA 3E Data
AA 4C Data
AA 4D Data
AA 4E Data
AA 5C Data
AA 5D Data
AA 5E Data
AA 6C Data
AA 6D Data
AA 6E Data
- 33 -
Byte4 OK N.A. Remark
cksu

m
cksu

m
cksu
Write data to MCU RAM

m
and update the related
cksu
register to refresh the

m
screen immediately.
cksu Don't store data to

m EEPROM.
cksu

m
cksu

m
cksu

m
cksu

m
Base on current color
cksu index to read back the

m right gain value.
cksu

m
cksu

m
cksu

m
cksu

m
cksu

m
cksu

m
cksu

m
cksu

m
cksu

m
cksu

m
cksu

m
cksu

m