LG FLATRON 27UD68WG - Signal Adjustment Communication; I2 C Communication and Command Protocol

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Only for training and service purposes
LGE Internal Use Only
6. Signal composition for adjustment
6.1 I2C (100K BPS)
6.2 COMMUNICATION START
#Until ACK BIT goes LOW, Repeat it.
6.3 Command form.
Command form use DDC2AB standard communication protocol.
START 6E A 50 A LEN A 03 A CMD A 00 A VAL A CS A STOP
a. LEN : DATA BYTE number to send.
b. CMD : Command language that monitor executes.
c. VAL : FOS DATA
d. CS : Dada’s CHECHSUM that transmit
e. DELAY : 50MS
f. A : Acknowledge
6.4 Screen adjust command (LENGTH = 84)
No. Adjustment contents CMD(hex
)
ADR VAL(hex) Explanation
1 EEPROM ALL INITIAL E4 00 00 adjustment Initialization
2 EEPROM READ E7 Slave
add
At EEPROM Read
3 EEPROM WRITE E8 Slave
add
Data Write data at EEPROM
4 R GAIN 16 00 00-64
Tune Gain
5 G GAIN 18 00 00-64
6 B GAIN 1A 00 00-64
7 BRIGHT(Backlight) 10 00 00-64 Tune Analog Bright
8 FACTORY RESET F0 00 00 Factory reset
9
AUTO_COLOR_ADJUST F1 00 0
AUTO COLOR Tuning
0:Auto color
10
COLOR_MODE_CHANG
E
F2 00
01 6500K
02 9300K
11 Elapsed time Clear E9 00 00
Aging off &Clear
elapsed time
12 Aging On/Off F3 00 FF/00 FF:ON / 00:OFF
13 Input Select F4 00
0xD0
0x90
0x91
1:DisplayPort
2:HDMI1
3:HDMI2
14
SYSTEM RESET F5 00 00 Restart System
15
Select Language 68 00
0x00 ~
0x0F
00:English,
01: German
02: French
START 6E A STOP 50Ms