參數(shù)資料
型號(hào)： ISP1563BM,557
廠商： ST-ERICSSON
元件分類： 總線控制器
英文描述： UNIVERSAL SERIAL BUS CONTROLLER, PQFP100
封裝： 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-420-1, LQFP-100
文件頁(yè)數(shù)： 54/102頁(yè)
文件大?。?/td> 466K
代理商： ISP1563BM,557
ISP1563_2
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 15 March 2007
55 of 102
NXP Semiconductors
ISP1563
HS USB PCI Host Controller
[1]
The reserved bits should always be written with the reset value.
[2]
X is 1 for OHCI1 (2P) and OHCI2 (2P); X is 0 for OHCI1 (1P) and OHCI2 (1P).
[3]
X is 0 for OHCI1 (2P) and OHCI2 (2P); X is 1 for OHCI1 (1P) and OHCI2 (1P).
11.1.20 HcRhDescriptorB register
The HcRhDescriptorB register (see Table 81) is the second of two registers describing the
characteristics of the root hub. These elds are written during initialization to correspond
to the system implementation. Reset values are implementation-specic.
Bit
7
6
5
4
3
2
1
0
Symbol
NDP[7:0]
Reset
000000
Access
RRRRRRRR
Table 80.
HcRhDescriptorA - Host Controller Root Hub Descriptor A register bit description
Address: Content of the base address register + 48h
Bit
Symbol
Description
31 to 24
POTPGT
[7:0]
Power On To Power Good Time: This byte species the duration the HCD must wait before
accessing a powered-on port of the Root Hub. It is implementation-specic. The unit of time is 2 ms.
The duration is calculated as POTPGT
× 2ms.
23 to 13
reserved
-
12
NOCP
No Overcurrent Protection: This bit describes how the overcurrent status for root hub ports are
reported. When this bit is cleared, the OCPM bit species global or per-port reporting.
0 — Overcurrent status is collectively reported for all downstream ports.
1 — No overcurrent protection supported.
11
OCPM
Overcurrent Protection Mode: This bit describes how the overcurrent status for root hub ports are
reported. At reset, this elds reects the same mode as Power Switching Mode. This eld is valid only
if the NOCP bit is cleared.
0 — Overcurrent status is collectively reported for all downstream ports.
1 — Overcurrent status is reported on a per-port basis.
10
DT
Device Type: This bit species that the root hub is not a compound device. The root hub is not
permitted to be a compound device. This eld must always read logic 0.
9
NPS
No Power Switching: This bit is used to specify whether power switching is supported or ports are
always powered. It is implementation-specic. When this bit is cleared, the PSM bit species global or
per-port switching.
0 — Ports are power switched.
1 — Ports are always powered on when the Host Controller is powered on.
8
PSM
Power Switching Mode: This bit is used to specify how the power switching of root hub ports is
controlled. It is implementation-specic. This eld is valid only if the NPS bit is cleared.
0 — All ports are powered at the same time.
1 — Each port is individually powered. This mode allows port power to be controlled by either the
global switch or per-port switching. If the PPCM (Port Power Control Mask) bit is set, the port
responds only to port power commands (Set/Clear Port Power). If the port mask is cleared, then the
port is controlled only by the global power switch (Set/Clear Global Power).
7 to 0
NDP[7:0] Number Downstream Ports: These bits specify the number of downstream ports supported by the
root hub. It is implementation-specic. The minimum number of ports is 1. The maximum number of
ports supported by OHCI is 15.
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