r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 1542

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

Section 35 USB Host Controller (USBH)
35.3.15 HcFrameRemaining Register (USBHFR)
Rev. 1.00 Oct. 01, 2007 Page 1476 of 1956
REJ09B0256-0100
Initial value :
Initial value :
Bit
31
30 to 14
13 to 0
R/W :
R/W :
Bit :
Bit :
FRT
Bit Name
FRT

FR
31
15
—
R
R
0
0
30
—
14
—
R
R
0
0
29
—
13
R
R
0
0
Initial Value R/W
0
All 0
All0
28
12
—
R
R
0
0
27
11
—
R
R
0
0
26
10
—
R
R
0
0
R
R
R
25
—
R
R
0
9
0
FrameRemainingToggle
Description
This bit is loaded with FrameIntervalToggle when
FrameRemaining is loaded.
Reserved
These bits are always read as 0. The write value
should always be 0
FrameRemaining
These bits are the 14-bit down counter used to
time a frame. When the Host Controller is in the
USB OPERATIONAL state, the counter
decrements each 12 MHz clock period. When the
count reaches 0, the end of a frame has been
reached. The counter reloads with FrameInterval
at that time. In addition, the counter reloads when
the Host Controller transitions into USB
OPERATIONAL.
24
—
R
R
0
8
0
23
—
FR[13:0]
R
R
0
7
0
22
—
R
R
0
6
0
21
—
R
R
0
5
0
20
—
R
R
0
4
0
19
—
R
R
0
3
0
18
—
R
R
0
2
0
17
—
R
R
0
1
0
16
—
R
R
0
0
0