AT43USB325 datasheet(94/109 Pages) ATMEL

94 / 109 page

3355C–USB–4/05

AT43USB325

8.5.4.3

Remote Wake-up, Downstream Ports

The hardware detects a connect/disconnect/port resume and propagates resume signaling

upstream. Finally, the hardware enables the oscillator and asserts the RSM interrupt.

8.5.4.4

Remote Wake-up, Embedded Function

The hardware detects an INT0/INT1 and propagates resume signaling upstream. Finally, the

hardware enables the oscillator and asserts the RSM and FRWUP interrupts.

8.5.4.5

Selective Suspend, Downstream Ports

Hardware

Firmware

Connect/disconnect/port resume

detected

Propagate resume signaling

Enable Oscillator

Set RSM bit

→ interrupt

Reset RSM and GBL SUSP bits

Restore GPIO states if required

Clear UOVCER bit 2

Enable peripheral activity

Hardware

Firmware

External event activates INT0/INT1

Propagate resume signaling

Enable Oscillator

Set RSM and FRMWUP bits

→

interrupt

Clear GLB SUSP, RSM, FRMWUP

bits

Restore GPIO states if required

Clear UOVCER bit 2

Enable peripheral activity

Hardware

Firmware

Set or Clear Port Feature

PORT_SUSPEND decoded

Write HPCON[2:0] and HPADD[2:0]

bits

Suspend or resume port per

command

AT43USB325 Datasheet(PDF) 94 Page - ATMEL Corporation

AT43USB325 Datasheet(HTML) 94 Page - ATMEL Corporation

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