ISP1561 データシートの表示（PDF） - Philips Electronics

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ISP1561

Hi-Speed USB PCI host controller

Philips Electronics 

Philips Semiconductors

ISP1561

USB PCI host controller

8. PCI

All LED indicators are open-drain output.

7.6 Power management

The ISP1561 provides an advanced power management capabilities 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. See

Section 10 for a detailed description on power management.

7.7 Legacy support

The ISP1561 provides legacy support for a USB keyboard and mouse. This means

that the keyboard and mouse should be able to work even before the OS boot-up,

with the necessary support in the system’s BIOS. Section 11.2 provides detailed

description on legacy support in the ISP1561.

7.8 Phase-Locked Loop (PLL)

A 12 to 30 MHz and 48 MHz clock multiplier PLL is integrated on-chip. This allows the

use of a low-cost 12 MHz crystal, which also minimizes EMI. No external components

are required for the PLL to operate.

8.1 PCI interface

The PCI interface has three functions. The first function (#0) and the second function

(#1) are for the OHCI Host Controllers, and the third function (#2) is for the EHCI Host

Controller. All functions supports both master and target accesses and share the

same PCI interrupt signal INTA#. These functions provide memory-mapped,

addressable operational registers as required in Open Host Controller Interface

Specifications Rev. 1.0a and Enhanced Host Controller Specification for Universal

Serial Bus Rev. 0.95.

Additionally, function #0 provides legacy keyboard and mouse support to comply with

Open Host Controller Interface Specification Rev. 1.0a.

Each function has its own configuration space, and the PCI enumerator should

allocate the memory address space for each of these functions. Power management

is implemented in each PCI function and all power states are provided. This allows

the system to achieve low power consumption by switching off the functions which

are not required.

8.1.1 PCI configuration space

PCI Local Bus Specification Rev. 2.2 requires that each of the three PCI functions of

the ISP1561 provides its own PCI configuration registers, which can vary in size. In

addition to the basic PCI configuration header registers, these functions implement

the capability registers to support power management.

The registers of each of these functions are accessed by the respective driver. The

detailed description of the various PCI configuration registers is given in Section 8.2.

9397 750 10015

Product data

Rev. 01 — 06 February 2003

© Koninklijke Philips Electronics N.V. 2003. All rights reserved.

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