AT90SCR100 datasheet(223/433 Pages) ATMEL

223 / 433 page

223

TPR0327AY–SMS–30Jan09

AT90SCR100

• 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.

• Bit 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.

• Bit 4 - Res : Reserved Bit

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

• 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.

• Bits 2..1 -Res : Reserved Bits

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

• Bit 0 - PEN : Pipe Enable

Set to enable the Pipe.

Clear to disable and reset the Pipe.

17.7.11

UPCFG0X - USB Pipe Configuration Register 0 for Pipe X

Set UPNUM register to point to the relevant Pipe before updating the UPCFG0X register.

• Bits 7..6 - PTYPE1..0 : Pipe Type

Select the type of the Pipe:

• 00: Control

• 01: Isochronous

• 10: Bulk

• 11: Interrupt

Bit

321

$00AA

PTYPE [1..0]

PTOKEN [1..0]

PEPNUM [3..0]

UPCFG0X

Read/write

R/W

Initial value

0x00

AT90SCR100 데이터시트(PDF) 223 Page - ATMEL Corporation

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