W90P710_05 Datasheet, PDF (186/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
BITS
31
[30:16]
[15:14]
[13:0]
FINTVT
FSLDP
Reserved
FINTV
DESCRIPTION
FrameIntervalToggle
This bit is toggled by HCD when it loads a new value into Frame Interval.
FSLargestDataPacket
This field specifies a value that is loaded into the Largest Data Packet
Counter at the beginning of each frame.
Reserved. Read/Write 0's
Frame Interval
This field specifies the length of a frame as (bit times - 1). For 12,000 bit
times in a frame, a value of 11,999 is stored here.
Host Controller Frame Remaining Register
REGISTER
HcFmInterval
ADDRESS
0xFFF0_5038
R/W
DESCRIPTION
RESET
VALUE
R Host Controller Frame Remaining Register 0x0000_0000
31
30
29
28
27
26
25
24
FRMT
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
FRM
7
6
5
4
3
2
1
0
FRM
BITS
[31]
[30:14]
[13:0]
FRMT
Reserved
FRM
DESCRIPTION
FrameRemainingToggle
Loaded with FrameIntervalToggle when Frame Remaining is loaded.
Reserved. Read/Write 0's
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 Frame Interval. In addition, the counter
loads when the Host Controller transitions into USBOPERATIONAL.
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