AT90SCR100 datasheet(226/433 Pages) ATMEL

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TPR0327AY–SMS–30Jan09

AT90SCR100

Set by hardware to indicate the PID data of the current bank:

• 00: Data0

• 01: Data1

•1x: Reserved.

For OUT Pipe, this value indicates the next data toggle that will be sent. This is not relative to the

current bank.

For IN Pipe, this value indicates the last data toggle received on the current bank.

• Bit 0..1 - NBUSYBK0..1 : Busy Bank Flag

Set by hardware to indicate that the number of busy banks.

For OUT Pipe, it indicates the number of busy bank(s), filled by the user, ready for OUT transfer.

For IN Pipe, it indicates the number of busy bank(s) filled by IN transaction from the Device.

• 00: All banks are free

• 01: 1 busy bank

• 10: 2 busy banks

•11: Reserved

17.7.15

UPINRQX - USB Pipe IN Request Register for Pipe X

Set UPNUM register to point to the relevant Pipe before using the UPINRQX register.

• Bits 7..0 - INRQ7..0 : IN Request Number Before Freeze

Enter the number of IN transactions before the USB controller freezes the pipe. The USB con-

troller will perform (INRQ+1) IN requests before to freeze the Pipe. This counter is automatically

decreased by 1 each time a IN request has been successfully performed.

17.7.16

UPERRX - USB Pipe Error Register for Pipe X

Set UPNUM register to point to the relevant Pipe before using the UPERRX register.

• Bit 7 - Res : Reserved

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

• Bits 6..5 - COUNTER1..0 : Error counter

This counter is increased by the USB controller each time an error occurs on the Pipe. When this

value reaches 3, the Pipe is automatically frozen.

Clear these bits by software.

Bit

321

$00A5

INRQ [7..0]

UPINRQX

Read/write

R/W

Initial value

0x00

Bit

765

$009D

COUNTER [1..0]

CRC16

PTIMEOUT

PID

DATAPID DATATGL UPERRX

Read/write

R/W

Initial value

0x00

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