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參數(shù)資料
| 型號： | ISP1561 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | ISP1561BM |
| 中文描述： | ISP1561BM |
| 文件頁數(shù)： | 13/102頁 |
| 文件大?。?/td> | 2875K |
| 代理商： | ISP1561 |
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Philips Semiconductors
ISP1561
USB PCI host controller
Product data
Rev. 01 — 06 February 2003
13 of 102
9397 750 10015
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
7.
Functional description
7.1 OHCI Host Controller
An OHCI Host Controller transfers data to devices at the Original USB defined bit rate
of 12 Mbit/s or 1.5 Mbit/s.
7.2 EHCI Host Controller
The EHCI Host Controller transfers data to a Hi-Speed USB compliant device at the
Hi-Speed USB defined bit rate of 480 Mbit/s. When the EHCI Host Controller has the
ownership of a port, the OHCI Host Controllers are not allowed to modify the port
register. All additional port bit definitions required for the Enhanced Host Controller
are not visible to the OHCI Host Controller.
7.3 Dynamic port-routing logic
The port-routing feature allows sharing of the same physical downstream ports
between the Original USB Host Controller and the Hi-Speed USB Host Controller.
This requirement of the Enhanced Host Controller Interface Specificationprovides
four downstream ports, and these ports are multiplexed with the ports of the two
OHCIs. The first and the third downstream ports are always connected to the first
OHCI, and the second and the fourth downstream ports are always connected to the
second OHCI.
The EHCI is responsible for the port-routing switching mechanism. Two register bits
are used for ownership switching. During power-on and system reset, the default
ownership of all downstream ports is the OHCIs. The Enhanced Host Controller
driver controls the ownership during normal functionality.
7.4 Hi-Speed USB analog transceivers
The Hi-Speed USB analog transceivers interface directly to the USB cables via
integrated termination resistors. These transceivers can transmit and receive serial
data at all data rates
:
high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed
(1.5 Mbit/s).
7.5 LED indicators for downstream ports
Indication of a good USB connection is provided through the GoodLink technology
(open-drain, a maximum current of 20 mA). During enumeration, LED indicators blink
ON momentarily corresponding to the enumeration traffic of the ISP1561 downstream
ports. The LED also blinks ON whenever there is valid traffic to the downstream port.
In the suspend mode, the LED is OFF.
The GoodLink feature provides a user-friendly indication on the status of the USB
traffic between the host and downstream hubs and devices. It is a useful diagnostics
tool to isolate faulty equipment and helps to reduce field support and hotline costs.
The system designer can also program two optional port indicators— a green LED
and an amber LED—to indicate the status of the Host Controller. These port
indicators are implemented as per the USB specification.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISP1561BM | ISP1561BM |
| ISP1562 | Hi-Speed Universal Serial Bus PCI Host Controller |
| ISP1562BE | Hi-Speed Universal Serial Bus PCI Host Controller |
| ISP1581 | Universal Serial Bus 2.0 high-speed interface device |
| ISP1581BD | Universal Serial Bus 2.0 high-speed interface device |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISP1561 HI-SPEED USB H | 制造商:NXP Semiconductors 功能描述: |
| ISP1561BM | 制造商:NXP Semiconductors 功能描述: |
| ISP1561BM,518 | 功能描述:USB 接口集成電路 USB 2.0 HOST CONTROLLER RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1561BM,551 | 功能描述:USB 接口集成電路 USB 2.0 HOST CONTROLLER RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| ISP1561BM,557 | 功能描述:USB 接口集成電路 DO NOT USE ORDER -S OR -T PART RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
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