Datasheet

295
7593L–AVR–09/12
AT90USB64/128
• 7-4 - Reserved
The value read from these bits is always 0. Do not set these bits.
• 3-0 - FNUM10:8 - Frame Number
The value contained in this register is the current SOF number.
This value can be modified by software.
• 7-0 - FNUM7:0 - Frame Number
The value contained in this register is the current SOF number.
This value can be modified by software.
• 7-0 - FLEN7:0 - Frame Length
The value contained the data frame length transmited.
24.16.2 USB Host Pipe registers
• 7-3 - Reserved
The value read from these bits is always 0. Do not set these bits.
• 2-0 - PNUM2:0 - Pipe Number
Select the pipe using this register. The USB Host registers ended by a X correspond then to this
number.
This number is used for the USB controller following the value of the PNUMD bit.
Bit 76543 2 1 0
- - - - - FNUM10 FNUM9 FNUM8 UHFNUMH
Read/writeRRRRR R R R
Initial value00000 0 0 0
Bit 76543210
FNUM7 FNUM6 FNUM5 FNUM4 FNUM3 FNUM2 FNUM1 FNUM0 UHFNUML
Read/writeRRRRRRRR
Initial value00000000
Bit 76543210
FLEN7 FLEN6 FLEN5 FLEN4 FLEN3 FLEN2 FLEN1 FLEN0 UHFLEN
Read/writeRRRRRRRR
Initial value00000000
Bit 765432 1 0
PNUM2 PNUM1 PNUM0 UPNUM
Read/write RW RW RW
Initial value00000 0 0 0