NUC920ABN Datasheet, PDF (230/529 Pages) Nuvoton Technology Corporation – 32-BIT ARM926EJ-S BASED MCU

NUC920ABN
32-BIT ARM926EJ-S BASED MCU
Host Controller Frame Remaining Register (HcFmRem)
Register
Address
R/W Description
HcFmRem ^0xB000_7038
R Host Controller Frame Remaining Register
Reset Value
0x0000_0000
31
30
29
28
27
26
25
24
FmRemT
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
FmRemain
7
6
5
4
3
2
1
0
FmRemain
Bits
[31]
[13:0]
Descriptions
FmRemT
FmRemain
Frame Remaining Toggle
Loaded with FrameIntervalToggle when FrameRemaining is loaded.
Frame Remaining
When the Host Controller is in the USBOPERATIONAL state, this 14-bit field
decrements each 12 MHz clock period. When the count reaches 0, (end of
frame) the counter reloads with FrameInterval. In addition, the counter
loads when the Host Controller transitions into USBOPERATIONAL.
Publication Release Date: Jun. 18, 2010
230
Revision: A3