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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 761 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
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CE
MA
NUA
L
Host Controller Frame Remaining Register (HcFmRem)
Register
Offset
R/W
Description
Reset Value
HcFmRem
0x038
R
Host Controller Frame Remaining Register
0x0000_0000
31
30
29
28
27
26
25
24
FR
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
FRT
7
6
5
4
3
2
1
0
FRT
Bits
Description
[31]
FR
Frame Remaining Toggle
Loaded with FrameIntervalToggle when FrameRemaining is loaded.
[30:14]
Reserved
Reserved.
[13:0]
FRT
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.