Datasheet

610
AT32UC3A
30.8.3.8 USB Host Frame Number Register (UHFNUM)
Offset: 0x0420
Register Name: UHFNUM
Access Type: Read/Write
Reset Value: 0x00000000
• FNUM: Frame Number
The value contained in this register is the current SOF number.
This value can be modified by software.
• FLENHIGH: Frame Length
This register gives the 8 high-order bits of the 14-bits internal frame counter (frame counter at 12 Mhz, counter length is
12000 to ensure a SOF generation every 1 ms).
31 30 29 28 27 26 25 24
– – – – – – – –
23 22 21 20 19 18 17 16
FLENHIGH
ru
0 0 0 0 0 0 0 0
15 14 13 12 11 10 9 8
– – FNUM
rwu
0 0 0 0 0 0
7 6 5 4 3 2 1 0
FNUM – – –
rwu
0 0 0 0 0
32058K
AVR32-01/12