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(4) DDC Command set
Adjustment
CMD
No.
ADR V ALUE
content
(HEX)
1
Aging On/Off
F3
00
2
Input select
F4
00
3
R GAIN
16
G GAIN
18
4
00
5
B GAIN
1A
R GAIN
16
6
7 7
G GAIN
18
01
8
B GAIN
1A
9
R GAIN
16
10
G GAIN
18
02
11
B GAIN
1A
12
CSM mode
F2
00
13
AUTO ADC
F1
00
14
EEPROM Read
E7
00
15
EEPROM Write
E8
00
7.4 DDC command protocol
7.4.1 Signal Table
START
6E
A
50
A
84
A
7.4.2 E 2 PROM Data Write
START
6E
A
50
A
84+n
Data_1
A
. . .
7.4.2.1 Signal Table
LEN : 84h + Byte
CMD : 8Eh
ADH : E 2 PROM Slave Address (A0, A2, A4, A8),
Not 00h (Reserved by Buffer to E 2 PROM )
ADL : E 2 PROM Sub Address ( 00~ FF)
Data : Write data
7.4.2.2 Command Set
No.
Adjustment contents
1
EEPROM WRITE
2
Copyright ©2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
detail
FF/00
FF : ON / OO : OFF
0x 10 :
DTV
0x 20 : AV1
0x 21 : AV2 (Nothing)
0x 40 : Component1(Nothing)
0x 41 : Component2(Nothing)
0x 60 : RGB
0x 90 : HDMI1
0x 91 : HDMI2(Nothing)
00 - C0
Gain Adjustment
00 - C0
Color temp.:COOL
00 - C0
00 - C0
Gain Adjustment
00 - C0
Color temp.:Medium
00 - C0
00 - C0
Gain Adjustment
00 - C0
Color temp.:Warm
00 - C0
00
COOL
01
Medium
02
Warm
0: Offset Adjustment
0, 1, 2
1: Gain Adjustment
2: Offset and Gain Adjustment
00
EEPROM read
data
EEPROM write
03
A
CMD
A
ADR
A
VAL
A
A
03
A
CMD
A
ADH
Data_n
A
CS
A
STOP
CMD(hex)
LEN
Details
E8 h
94
16-Byte Write
(84+n) h
n-byte Write
- use
• EDID write : 16-byte by 16-byte, 8 order (128-byte)
write(TO "00 – 7F" of "EEPROM Page A4")
• FOS
(HFh,HFl,VF,STD,HP,VP,Clk,ClkPh,PhFine) write
• Random Data write : write the appointment Address of
E2PROM
7.4.3 E 2 PROM Data Read
7.4.3.1 Signal Table
START
6E
A
Delay 150ms
START
6F
A
7.4.3.2 Command Set
No.
Adjustment
1
EEPROM READ
2
3
4
5
6
7
8
- use: Read the appointment of E2PROM by 128(80h)-byte.
CS
A
STOP
A
ADL A
- 18 -
Default
write
50
A
84
A
03
A
CMD
A
----------------------------------------------------------------------
D1
A
128 Bytes
contents
CMD A DH
ADL
E7
A0
0
80
A2
0
80
A4
0
80
A6
0
80
:
16-mode
data
STOP
ADH
A
ADL
A
CS
A
STOP
Dn
A
Details
0-Page
0~7F Read
0-Page 80~FF Read
1-Page
0~7F Read
1-Page 80~FF Read
2-Page
0~7F Read
2-Page 80~FF Read
3-Page
0~7F Read
3-Page 80~FF Read
LGE Internal Use Only
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