(1) Transmission from master (normal process)
ENQ code (05H）
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| 1 |
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| 2 | ACK code (06H) |
| HITACHI |
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| Transmit data (ASCII code) |
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| 3 |
| Slave | 4 | ACK code (06H) |
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| Master (PC) | ||
① | Session starts when ENQ is sent from master to slave. | ||
② | Slave acknowledges by returning ACK to master. | ||
③ | Master sends data to slave. |
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④ | Slave acknowledges receipt of data by again returning ACK to master and end the handshake. | ||
(2） Master reads data (normal process)
ENQ code (05H)
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| 1 |
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| 2 | ACK code (06H) |
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| HITACHI |
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| Read command (ASCII code) | 3 |
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| 4 | ACK code (06H) |
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| Slave |
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| Read data (ASCII code) |
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5 |
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| ACK code (06H) | 6 | Master (PC) | ||
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① | Session starts when ENQ is sent from master to slave. |
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② | Slave acknowledges by returning ACK to master. |
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③ | Master sends read command to slave. |
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④ | Slave receives read command, then acknowledges by returning ACK code to master. | ||||
⑤ | Slave sends read data to master. |
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⑥ | Master receives read data, then acknowledges by returning ACK code to slave. | ||||
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