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.
Bit
7
6
5
4
3
2
1
0
INTFRQ7 INTFRQ6 INTFRQ5 INTFRQ4 INTFRQ3 INTFRQ2 INTFRQ1 INTFRQ0 UPCFG2X
Read/Write
Initial Value
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
RW
0
• 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.
Bit
7
6
5
4
3
2
1
0
CFGOK
OVERFI UNDERFI
-
DTSEQ1:0
NBUSYBK
UPSTAX
Read/Write
Initial Value
R
0
RW
0
RW
0
R
0
R
0
R
0
R
0
0
• 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
307
7593A–AVR–02/06
ATMEL [ ATMEL ]
