ISP1563 Datasheet, PDF (57/107 Pages) NXP Semiconductors – Hi-Speed Universal Serial Bus PCI Host Controller

Philips Semiconductors
ISP1563
HS USB PCI Host Controller
11.1.18 HcLSThreshold register
This register contains an 11-bit value used by the Host Controller to determine whether to
commit to the transfer of a maximum of 8 B low-speed packet before EOF. Neither the
Host Controller nor the HCD can change this value. For bit allocation, see Table 76.
Table 76: HcLSThreshold - Host Controller LS Threshold register bit allocation
Address: Value read from func0 or func1 of address 10h + 44h
Bit
31
30
29
28
27
26
25
24
Symbol
reserved ^[1]
Reset
0
0
0
0
0
0
0
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
23
22
21
20
19
18
17
16
Symbol
reserved ^[1]
Reset
0
0
0
0
0
0
0
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
15
14
13
12
11
10
9
8
Symbol
reserved ^[1]
LST[11:8]
Reset
0
0
0
0
0
1
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
7
6
5
4
3
2
1
0
Symbol
LST[7:0]
Reset
0
0
1
0
1
0
0
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
[1] The reserved bits should always be written with the reset value.
Table 77: HcLSThreshold - Host Controller LS Threshold register bit description
Address: Value read from func0 or func1 of address 10h + 44h
Bit
Symbol Description
31 to 12 reserved -
11 to 0
LST[11:0]
LS Threshold: 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.
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 shows the bit allocation of the HcRhDescriptorA register.
Table 78: HcRhDescriptorA - Host Controller Root Hub Descriptor A register bit allocation
Address: Value read from func0 or func1 of address 10h + 48h
Bit
31
30
29
28
27
26
25
24
Symbol
POTPGT[7:0]
Reset
1
1
1
1
1
1
1
1
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
9397 750 14224
Product data sheet
Rev. 01 — 14 July 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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