ISP1563 Просмотр технического описания (PDF) - Philips Electronics

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ISP1563

Hi-Speed Universal Serial Bus PCI Host Controller

Philips Electronics 

Philips Semiconductors

ISP1563

HS USB PCI Host Controller

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 Specification for Universal Serial Bus Rev. 1.0

provides four downstream ports, and these ports are multiplexed with the ports of the two

OHCIs. The first and third downstream ports are always connected to the first OHCI, and

the second and 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 OHCI. The Enhanced Host Controller Driver (HCD) controls

the ownership during normal functionality.

7.4 Hi-Speed USB analog transceivers

The Hi-Speed USB analog transceivers directly interface to the USB cables through

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

The system designer can 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 according to the USB specification.

All LED indicators are open-drain output.

7.6 Power management

The ISP1563 provides an advanced power management capability interface that is

compliant with PCI Bus Power Management Interface Specification Rev. 1.1. Power is

controlled and managed by the interaction between drivers and PCI registers.

For a detailed description on power management, see Section 10.

9397 750 14224

Product data sheet

Rev. 01 — 14 July 2005

© Koninklijke Philips Electronics N.V. 2005. All rights reserved.

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