Hitachi 42EDT41A, Руководство по обслуживанию

Страница: 11 / 89

11
PW1A
Plasma TV
2.2- Data Format
(1)
Terminal Mode control format
(Turning on and Off Terminal Mode)
- Terminal On is achieved by sending a 1 byte command of 05 (Hex).
- Terminal Off is achieved by sending a 1 byte command of 04 (Hex)
ON
/
Off
Figure. 2
(2)
Terminal Communication Format
(Sending Commands to TV)
-
Commands are sent to the TV in 14 byte strings
-
The strings consist of the following:
Start :
1 byte (02) Hex (STX)
Command:
12 byte
Stop:
1 Byte (03) Hex (ETX)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Start Stop
Figure. 3
(3)
Television Answer Format
(Showing current Status)
-
The television responds with a 6 byte answer strings as follows:
Start:
1 byte (02) Hex (STX)
Response:
4 byte (Upper Data/Lower Data)
Stop:
1 Byte (03) Hex (ETX)
1 2 3 4 5 6
Start Stop
Figure. 4
(4)
Television Answer Format
(Status of Command Execution)
-
Acknowledgement: (06) Hex (ACK)
- No Acknowledgement: (15) Hex (NAK)
ACK
/
NAK
Figure. 5
Function
(2 Byte)
Function
(2 Byte)
Function
(2 Byte) Read/Write
(2 Byte)
Function (2 Byte)
Upper Data
(2 Byte)
Function (2 Byte)
Lower Data
(2 Byte)
Function (2 Byte)
STX
(1 Byte)
ETX
(1 Byte)
Upper Data
(2 Byte)
STX
(1 Byte)
ETX
(1 Byte)
Lower Data
(2 Byte)