HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 571
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HD6417660
Manufacturer Part Number
HD6417660
Description
Renesas 32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417660.pdf
(846 pages)
- Current page: 571 of 846
- Download datasheet (6Mb)
19.3.17 HcPeriodicStart Register (HPSR)
HPSR has a 14-bit programmable value, which determines the earliest time when the host
controller should start to process the periodic list.
Bit
31 to 14 —
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit Name
PS13
PS12
PS11
PS10
PS9
PS8
PS7
PS6
PS5
PS4
PS3
PS2
PS1
PS0
Initial
Value
All 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Reserved
These bits are always read as 0. The write value should
always be 0. The operation is not guaranteed if 1 is
written to these bits.
Periodic Start
This field is cleared after the hardware reset. Then this
field is set by the host controller driver while the host
controller performs initial settings. This value is roughly
calculated as 10% off from the HcFmInterval register. The
normal value is H '2A2F.
When the HcFmRemaining register reaches the specified
value, the processing of the periodic list has a higher
priority than the control/bulk processing. Consequently,
the host controller starts to process the periodic list after
the completion of the current control/bulk transaction.
Rev. 1.00, 02/04, page 533 of 804
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