參數(shù)資料
型號: 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
文件頁數(shù): 54/98頁
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
54 of 98
Philips Semiconductors
ISP1562
USB PCI Host Controller
11.1.19
HcRhDescriptorA register
This register is the first of two registers describing the characteristics of the Root Hub.
Reset values are implementation-specific.
Table 78
contains the bit allocation of the HcRhDescriptorA register.
[1]
The reserved bits should always be written with the reset value.
Table 77:
Address: Value read from func0 or func1 of address 10h + 44h
Bit
Symbol
Description
31 to 12
reserved
-
11 to 0
LST[11:0]
LSThreshold
: This field contains a value that is compared to the FR[13:0]
field, before initiating a low-speed transaction. The transaction is started
only if FR
this field. The value is calculated by the HCD, considering the
transmission and setup overhead.
HcLSThreshold - Host Controller LS Threshold register bit description
Table 78:
Address: Value read from func0 or func1 of address 10h + 48h
Bit
31
Symbol
Reset
1
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
HcRhDescriptorA - Host Controller Root Hub Descriptor A register bit allocation
30
29
28
27
26
25
24
POTPGT[7:0]
1
R/W
20
reserved
[1]
0
R/W
12
NOCP
0
R/W
4
NDP[7:0]
0
R
1
1
1
1
1
1
R/W
22
R/W
21
R/W
19
R/W
18
R/W
17
R/W
16
0
0
0
0
0
0
R/W
14
R/W
13
R/W
11
OCPM
1
R/W
3
R/W
10
DT
0
R
2
R/W
9
NPS
0
R/W
1
R/W
8
PSM
1
R/W
0
0
0
R/W
6
R/W
5
0
R
0
R
0
R
0
R
0
R
1
R
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