AT90USB646 datasheet(261/435 Pages) ATMEL

261 / 435 page

261

7593D–AVR–07/06

AT90USB64/128

Moreover, the pad can also be put in the “idle” mode if the DETACH bit is set. It come back in

the active mode when the DETACH bit is cleared.

21.9

OTG timers customizing

It is possible to refine some OTG timers thanks to the OTGTCON and OTGCON registers

• PAGE=00b: AWaitVrise time-out. [OTG] chapter 6.6.5.1

• VALUE=00bTime-out is set to 20 ms

• VALUE=01bTime-out is set to 50 ms

• VALUE=10bTime-out is set to 70ms

• VALUE=11bTime-out is set to 100 ms

• PAGE=01b: VbBusPulsing. [OTG] chapter 5.3.4

• VALUE=00bTime-out is set to 15 ms

• VALUE=01bTime-out is set to 23 ms

• VALUE=10bTime-out is set to 31 ms

• VALUE=11bTime-out is set to 40 ms

• PAGE=10b: PdTmOutCnt. [OTG] chapter 5.3.2

• VALUE=00bTime-out is set to 93 ms

• VALUE=01bTime-out is set to 105 ms

• VALUE=10bTime-out is set to 118 ms

• VALUE=11bTime-out is set to 131 ms

• PAGE=11b: SRPDetTmOut. [OTG] chapter 5.3.3

• VALUE=00bTime-out is set to 10 us

• VALUE=01bTime-out is set to 100 us

• VALUE=10bTime-out is set to 1 ms

• VALUE=11bTime-out is set to 11 ms

21.10 Plug-in detection

The USB connection is detected by the VBUS pad, thanks to the following architecture:

SUSPI

Suspend detected = USB pad power down

Clear Suspend by software

Resume = USB pad wake-up

Clear Resume by software

WAKEUPI

PAD status

Active

Power Down

Active

AT90USB646 Datasheet(PDF) 261 Page - ATMEL Corporation