1. Communication Parameter
Communication system | |
Synchronous system | Asynchronous communication |
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Baud rate | 9600 bps |
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Character length | 8 bit |
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Parity | None |
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Start bit | 1 bit |
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Stop bit | 1 bit |
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Flow control | None |
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2. Pin Configuration
Display side | Host side |
3. Communication Data Format
(a) Control (Host → Request of Write to Display)
No. | Item | Value |
1 | Header | 0x8C: Control |
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2 | Category | 0xXX |
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3 | Function | 0xXX |
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4 | Data1 (Length) | 0xXX |
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5 | Data2 (Data1) | 0xXX |
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: | : | 0xXX |
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: | : | 0xXX |
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X | DataX | 0xXX |
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X+1 | Check Sum | 0xXX |
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*Check Sum: If the value of a sum total of 1 to X exceeds 255 (1 byte), the data of 1 lower byte is effective.
(b) Enquiry (Host → Request of Read to Display)
5 4 3 2 1
9 8 7 6
_ External view _
Pin No. Signal
1NC
2RD
3TD
4NC
5GND
6NC
7NC
8NC
9NC
Personal computer
5 4 3 2 1
9 8 7 6
_ External view _
Pin No. Signal
1NC
2RD
3TD
4NC
5GND
6NC
7NC
8NC
9NC
No. | Item | Value |
1 | Header | 0x83: Enquiry |
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2 | Category | 0xXX |
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3 | Function | 0xXX |
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4 | Data1 | 0xFF |
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5 | Data2 | 0xFF |
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6 | Check Sum | 0xXX |
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*Check Sum: If the value of a sum total of 1 to 5 exceeds 255 (1 byte), the data of 1 lower byte is effective.
3 |
