Command Definition - BenQ G2220HD 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
Write Cx R-Gain Data to EEPROM
Write Cx G-Gain Data to EEPROM
Write Cx B-Gain Data to EEPROM
Write Contrast to EEPROM
Write Brightness to EEPROM
Write C/T index to EEPROM
Write OSD-Hpos to EEPROM
Byte Byte
Byte1 2 3
55 Data cksum √
CA
56 Data cksum √
CA
57 Data cksum √
CA
58 Data cksum √
CA
59 Data cksum √
CA
XX cksum √
C3 55
XX cksum √
C3 56
XX cksum √
C3 57
XX cksum √
C3 58
XX cksum √
C3 59
3C Data cksum √
AA
3D Data cksum √
AA
3E Data cksum √
AA
4C Data cksum √
AA
4D Data cksum √
AA
4E Data cksum √
AA
5C Data cksum √
AA
5D Data cksum √
AA
5E Data cksum √
AA
6C Data cksum √
AA
6D Data cksum √
AA
6E Data cksum √
AA
AA 7C Data cksum
AA 7D Data cksum
AA 7E Data cksum
92 Data cksum √
AA
93 Data cksum √
AA
1~4 cksum √
AA 94
95 Data cksum √
AA
- 32 -
Byte4 OK NA Remark
Write data to MCU RAM
and update the related
register to refresh the
screen immediately.
Don't store data to
EEPROM.
Base on current color
index to read back the
right gain value.
√
Reserved for some
√
model have extra color
temperature
√
3=C3/5800/Reddish,
1=C1/9300/Bluish,
2=C2/6500/sRGB/,
4=User, 5=Cx