AT90USB646 datasheet(307/434 Pages) ATMEL

307 / 434 page

307

7593A–AVR–02/06

AT90USB64/128

- 110: 512

- 111: 1024

• 3-2 - PBK1:0 - Pipe Bank

Select the number of bank to declare for the current Pipe.

- 00: 1 bank

- 01: 2 banks

- 10: invalid

- 11: invalid

• ALLOC

Configure Pipe Memory

Set to configure the pipe memory with the characteristics.

Clear to update the memory allocation. Refer to the Memory Management chapter for more

details.

7 - Reserved

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

• 7 - INTFRQ7:0 - Interrupt Pipe Request Frequency

These bits are the maximum value in millisecond of the pulling period for an Interrupt Pipe.

This value has no effect for a non-Interrupt Pipe.

• 7 - CFGOK - Configure Pipe Memory OK

Set by hardware if the required memory configuration has been successfully performed.

Cleared by hardware when the pipe is disabled. The USB reset and the reset pipe have no effect

on the configuration of the pipe.

• 6 - OVERFI - Overflow

Set by hardware when a the current Pipe has received more data than the maximum length of

the current Pipe. An interrupt is triggered if the FLERRE bit is set.

Shall be cleared by software. Setting by software has no effect.

• 5 - UNDERFI - Underflow

Bit

65432

INTFRQ7

INTFRQ6

INTFRQ5

INTFRQ4

INTFRQ3

INTFRQ2

INTFRQ1

INTFRQ0 UPCFG2X

Read/Write

RWRWRW

RWRWRWRWRW

Initial Value

00000

Bit

765

3210

CFGOK

OVERFI

UNDERFI

DTSEQ1:0

NBUSYBK

UPSTAX

Read/Write

RRRR

Initial Value

000

0000

AT90USB646 Datasheet(PDF) 307 Page - ATMEL Corporation

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