AT90USB646 datasheet(305/434 Pages) ATMEL

305 / 434 page

305

7593A–AVR–02/06

AT90USB64/128

• 1 - P1RST - Pipe 1 Reset

Set this bit to 1 and reset this bit to 0 to reset the Pipe 1.

• 0 - P0RST - Pipe 0 Reset

Set this bit to 1 and reset this bit to 0 to reset the Pipe 0.

•7 - Reserved

The value read from this bit is always 0. Do not set this bit.

• 6 - PFREEZE - Pipe Freeze

Set this bit to Freeze the Pipe requests generation.

Clear this bit to enable the Pipe request generation.

This bit is set by hardware when:

- the pipe is not configured

- a STALL handshake has been received on this Pipe

- An error occurs on the Pipe (PERR = 1)

- (INRQ+1) In requests have been processed

This bit is set at 1 by hardware after a Pipe reset or a Pipe enable.

• 5 - INMODE - IN Request mode

Set this bit to allow the USB controller to perform infinite IN requests when the Pipe is not frozen.

Clear this bit to perform a pre-defined number of IN requests. This number is stored in the UIN-

RQX register.

•4 - Reserved

The value read from this bit is always 0. Do not set this bit.

• 3 - RSTDT - Reset Data Toggle

Set this bit to reset the Data Toggle to its initial value for the current Pipe.

Cleared by hardware when proceed. Clearing by software has no effect.

•2 - Reserved

The value read from these bits is always 0. Do not set these bits.

•1 - Reserved

The value read from these bits is always 0. Do not set these bits.

• 0 - PEN - Pipe Enable

Set to enable the Pipe.

Bit

PFREEZE

INMODE

RSTDT

PEN

UPCONX

Read/Write

Initial Value

AT90USB646 Datasheet(PDF) 305 Page - ATMEL Corporation