LG FLATRON 29UM68 - COMMUNICATION PROTOCOLS AND COMMANDS (Continued); EDID and EEPROM Data Read Operations

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Only for training and service purposes
LGE Internal Use Only
<14mode data> write
SyncFlags,HPeriodH, HPeriodL, VtotalH,VtotalL,SrcHTotalH, SrcHTotalL
SrcHStartH, SrcHStartL, SrcVStartH,SrcVStartL, HsyncPhase
Temporary Data write: Write to particular address of EEPROM.
6.6 E PROM Data Read
2
6.6.1 Signal TABLE
----------------------------------------------------------------------
128 Bytes
6.6.2 COMMAND SET
No.
Adjustment contents
CMD(hex)
ADH(hex) ADL(hex) Explanation
1 EEPROM READ E7
A0 0 0-Page 0~7F Read
2
80 0-Page 80~FF Read
3
A2 0 1-Page 0~7F Read
4
80 1-Page 80~FF Read
5
A4 0 2-Page 0~7F Read
6
80 2-Page 80~FF Read
7
A6 0 3-Page 0~7F Read
8
80 3-Page 80~FF Read
9
A8 0 4-Page 0~7F Read
10
80 4-Page 80~FF Read
11
AA 0 5-Page 0~7F Read
12
80 5-Page 80~FF Read
13 AC 0 6-Page 0~7F Read
14
80 6-Page 80~FF Read
15
AE 0 7-Page 0~7F Read
16 80 7-Page 80~FF Read
6.6.3 Use
Read E PROM’s specific area as unit of 128(80h)-byte. ( 84h )
2
6.6.4 EDID Write
EEPROM access by using DDC2B protocol
1-Byte write
STOP
A A D1 6F
STOP
START
A
A
A
Dn
A A A 50 6E 03 CMD ADH84
START
A A ADL A CS
Delay 150ms
STOP
A LA0 DSTART
A
A
L : 0x00~0x7F
D : data
8-byte write
L : 0x00,0x10,….0x70
STOP
AAA A LA0 ….
Data8
Data1 START A
6.6.5 EDID Read
DDC2B Command.(A0/A1)
STOP
A 00
A0
START A A CS A Data1A1START . . . Data128
- 128 Byte transfer of EDID Buffer of MICOM