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AT43USB326 датащи(PDF) 75 Page - ATMEL Corporation |
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AT43USB326 датащи(HTML) 75 Page - ATMEL Corporation |
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75 / 102 page ![]() 75 AT43USB326 3313D–USB–04/06 Selective Suspend, Downstream Ports Selective Suspend, Embedded Function Selective Resume, Embedded Function Hardware Firmware 1. Set or Clear Port Feature PORT_SUSPEND decoded 2. Write HPCON[2:0] and HPADD[2:0] bits 3. Suspend or resume port per command Hardware Firmware 1. Set Port Feature PORT_SUSPEND decoded 2. Disable Port 1’s endpoints 3. Set GPIO to low power state if required Hardware Firmware 1. Clear Port Feature PORT_SUSPEND decoded 2. Clear Port 1 suspend status bit 3. Restore GPIO states if required 4. Wait 23 ms, then set enable status bit and suspend change bit 5. Enable Port 1 endpoints 6. Send updated port status at next IN to endpoint1 |
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