參數(shù)資料
型號(hào)： ISP1562BE
廠商： NXP SEMICONDUCTORS
元件分類： 總線控制器
英文描述： Hi-Speed Universal Serial Bus PCI Host Controller
中文描述： UNIVERSAL SERIAL BUS CONTROLLER, PQFP100
封裝： 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-407-1, LQFP-100
文件頁(yè)數(shù)： 71/98頁(yè)
文件大小： 442K
代理商： ISP1562BE
9397 750 14223
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 01 — 14 July 2005
71 of 98
Philips Semiconductors
ISP1562
USB PCI Host Controller
11.3.4
FRINDEX register
The Frame Index (FRINDEX) register is used by the Host Controller to index into the
periodic frame list. The register updates every 125
μ
s—once each micro frame.
Bits N to 3 are used to select a particular entry in the periodic frame list during periodic
schedule execution. The number of bits used for the index depends on the size of the
frame list as set by the system software in FLS[1:0] (bits 3 to 2) of the USBCMD register.
This register must be written as a DWord. Byte writes produce undefined results. This
register cannot be written unless the Host Controller is in the halted state, as indicated by
HCH (bit 12 in the USBSTS register). A write to this register while RS (bit 0 in the
USBCMD register) is set produces undefined results. Writes to this register also affect the
SOF value.
The bit allocation is given in
Table 98
.
[1]
The reserved bits should always be written with the reset value.
Table 98:
Address: Value read from func2 of address 10h + 2Ch
Bit
31
Symbol
Reset
0
Access
R/W
Bit
23
Symbol
Reset
0
Access
R/W
Bit
15
Symbol
reserved
[1]
Reset
0
Access
R/W
Bit
7
Symbol
Reset
0
Access
R/W
FRINDEX - Frame Index register bit allocation
30
29
28
27
26
25
24
reserved
[1]
0
0
0
0
0
0
0
R/W
22
R/W
21
R/W
20
R/W
19
R/W
18
R/W
17
R/W
16
reserved
[1]
0
0
0
0
0
0
0
R/W
14
R/W
13
R/W
12
R/W
11
FRINDEX[13:8]
0
R/W
3
R/W
10
R/W
9
R/W
8
0
0
0
0
0
0
R/W
6
R/W
5
R/W
4
FRINDEX[7:0]
0
R/W
R/W
2
R/W
1
R/W
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
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