at43usb320a ATMEL Corporation, at43usb320a Datasheet - Page 98

• Manufacturer Part Number: at43usb320a
• Description: Full-speed Usb Microcontroller With An Embedded Hub
• Manufacturer: ATMEL Corporation

Remote Wake-up,
Downstream Ports
Remote Wake-up,
Embedded Function
Selective Suspend,
Downstream Ports
98
AT43USB320A
The hardware detects a connect/disconnect/port resume and propagates resume signaling
upstream. Finally, the hardware enables the oscillator and asserts the RSM interrupt.
The hardware detects an INT0/INT1 and propagates resume signaling upstream. Finally, the
hardware enables the oscillator and asserts the RSM and FRWUP interrupts.
1. Connect/disconnect/port resume
2. Propagate resume signaling
3. Enable Oscillator
4. Set RSM bit → interrupt
2. Propagate resume signaling
3. Enable Oscillator
4. Set RSM and FRMWUP bits →
3. Suspend or resume port per
detected
interrupt
command
Hardware
Hardware
Hardware
1.External event activates INT0/INT1
5. Reset RSM and GBL SUSP bits
6. Restore GPIO states if required
7. Clear UOVCER bit 2
8. Enable peripheral activity
5. Clear GLB SUSP, RSM, FRMWUP bits
6. Restore GPIO states if required
7. Clear UOVCER bit 2
8. Enable peripheral activity
1. Set or Clear Port Feature
2. Write HPCON[2:0] and HPADD[2:0]
PORT_SUSPEND decoded
bits
Firmware
Firmware
Firmware
1443E–USB–4/04