SAF1562HL NXP [NXP Semiconductors], SAF1562HL Datasheet - Page 70

• Manufacturer Part Number: SAF1562HL
• Description: Hi-Speed Universal Serial Bus PCI Host Controller
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
SAF1562_1
Product data sheet
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 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] (bit 3 and bit 2) of the USBCMD
register. This register must be written as a double word. 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.
Address: Value read from func2 of address 10h + 2Ch
[1]
Bit
Symbol
Reset
Access
Bit
Symbol
Reset
Access
Bit
Symbol
Reset
Access
Bit
Symbol
Reset
Access
The reserved bits should always be written with the reset value.
FRINDEX - Frame Index register bit allocation
R/W
R/W
R/W
R/W
31
23
15
0
0
0
7
0
reserved
Rev. 01 — 7 February 2007
R/W
R/W
R/W
R/W
[1]
30
22
14
0
0
0
6
0
Table
R/W
R/W
R/W
R/W
29
21
13
0
0
0
5
0
98.
Hi-Speed Universal Serial Bus PCI Host Controller
R/W
R/W
R/W
R/W
FRINDEX[7:0]
28
20
12
0
0
0
4
0
reserved
reserved
R/W
R/W
FRINDEX[13:8]
R/W
R/W
[1]
[1]
27
19
11
0
0
0
3
0
R/W
R/W
R/W
R/W
26
18
10
2
0
0
0
0
SAF1562
© NXP B.V. 2007. All rights reserved.
R/W
R/W
R/W
R/W
25
17
0
0
9
0
1
0
R/W
R/W
R/W
R/W
70 of 97
24
16
0
0
8
0
0
0