AT90USB646 datasheet(302/459 Pages) ATMEL

302 / 459 page

302

7593H–AVR–11/08

ATmega32U6/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 (UPINTX.PERRI = 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

6543

PFREEZE

INMODE

RSTDT

PEN

UPCONX

Read/Write

Initial Value

0000

AT90USB646 Datasheet(PDF) 302 Page - ATMEL Corporation

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