BenQ T201WA, Service Manual

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Write EDID data to MCU DDC RAM
55 NA NA NA
√
For MTV312 MCU type
Copy DDC RAM data to EEPROM
BB NA NA NA
√
For MTV312 MCU type
Drive WP pin to low to enable write DDC IC
55 NA NA NA
√
For stand alone DDC IC
Drive WP pin to high to disenable write function
BB NA NA NA
√
For stand alone DDC IC
Switch DDC bus to DVI-A DDC IC
44 NA NA NA
√
For input signal with multi-
input source
Switch DDC bus to DVI-D DDC IC
33 NA NA NA
√
For input signal with multi-
input source
Change Senseye Mode C0 0~3 XX cksum
√
Change Power Status D0 Data XX cksum
√
PowerOFF: Data=AA
PowerON: Data=Other Value
Change Language Type D1 Data XX ckssum
√
Asia: Data=AA
European: Data=Other Value
EEPROM Bank R/W (For Debug using only, not for Production Line Write EEPROM directly)
Read EEPROM Bank 0 B0
Address
XX cksum
√
Read EEPROM Bank 1 B1
Address
XX cksum
√
Read EEPROM Bank 2 B2
Address
XX cksum
√
(For 24C08 type)
Read EEPROM Bank 3 B3
Address
XX cksum
√
(For 24C08 type)
Write EEPROM Bank 0 B8
Address
Data cksum
√
Write EEPROM Bank 1 B9
Address
Data cksum
√
Write EEPROM Bank 2 BA
Address
Data cksum
√
(For 24C08 type)
Write EEPROM Bank 3 BB
Address
Data cksum
√
(For 24C08 type)
Note A: Byte4 (cksum) = Byte1 + Byte2 + Byte3
Note B: Data = The value write to MCU or EEPROM
Note C: XX = don't care, any value (<=0xFF).
When PC Host sends 0x7D command to MCU, MCU must return as following (2 bytes)
Return Code R-Byte1 R-Byte2
Checksum error code FC AA
Normal return code the above Byte3 (/data) FC
If normal return code is exact FCh FC CF