Software – General Concepts
The General USB Process | ||
Packets Associated with Each Type of Transfer | ||
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Transfer Type | Stages (Transactions) | Phases (Packets) |
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Control | Setup | Token |
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| Data |
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| Handshake |
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| Data (IN or OUT) | Token |
| (optional) | Data |
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| Handshake |
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| Status (IN or OUT) | Token |
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| Data |
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| Handshake |
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Bulk | Data (IN or OUT) | Token |
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| Data |
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| Handshake |
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Interrupt | Data (IN or OUT) | Token |
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| Data |
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| Handshake |
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Isochronous | Data (IN or OUT) | Token |
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| Data |
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