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| 型号： | ISP1561BM,557 |
| 厂商： | ST-ERICSSON |
| 元件分类： | 总线控制器 |
| 英文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PQFP128 |
| 封装： | 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-420-1, LQFP-128 |
| 文件页数： | 55/103页 |
| 文件大小： | 457K |
| 代理商： | ISP1561BM,557 |
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ISP1561_2
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 5 March 2007
55 of 103
NXP Semiconductors
ISP1561
HS USB PCI Host Controller
11.1.20 HcRhDescriptorB register (address: content of the base address register +
4Ch)
The HcRhDescriptorB register is the second of two registers describing the characteristics
of the root hub. The bit allocation is given in Table 81. These elds are written during
initialization to correspond with the system implementation. Reset values are
implementation-specic.
Table 80.
HcRhDescriptorA register: bit description
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 (Overcurrent Protection Mode) eld species global or per-port
reporting.
0 — Overcurrent status is reported collectively 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 eld 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 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 (Power
Switching Mode) eld 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 only valid if the NPS eld is cleared.
0 — All ports are powered at the same time.
1 — Each port is powered individually. 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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相关代理商/技术参数 |
参数描述 |
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| ISP1561BMGE | 功能描述:IC USB PCI HOST CTRLR 128-LQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:4,900 系列:- 控制器类型:USB 2.0 控制器 接口:串行 电源电压:3 V ~ 3.6 V 电流 - 电源:135mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:36-VFQFN 裸露焊盘 供应商设备封装:36-QFN（6x6） 包装:* 其它名称:Q6396337A |
| ISP1561BMUM | 功能描述:IC USB HOST CTRL HI-SPD 128LQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:4,900 系列:- 控制器类型:USB 2.0 控制器 接口:串行 电源电压:3 V ~ 3.6 V 电流 - 电源:135mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:36-VFQFN 裸露焊盘 供应商设备封装:36-QFN（6x6） 包装:* 其它名称:Q6396337A |
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| ISP1562BE | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Hi-Speed USB PCI host controller |
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