STPCE1HDBC datasheet(8/87 Pages) STMICROELECTRONICS

部件名	STPCE1HDBC

功能描述	X86 Core General Purpose PC Compatible System - on - Chip

PDF	87 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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8 / 87 page

GENERAL DESCRIPTION

8/87

Release 1.3 - January 29, 2002

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

1.4. CLOCK TREE

The STPC Elite integrates many features and

generates all its clocks from a single 14MHz

oscillator. This results in multiple clock domains as

described in Figure 1-2.

The speed of the PLLs is either fixed (DEVCLK),

either programmable by strap option (HCLK)

either

programmable

software

(GPCLK,

MCLK). When in synchronized mode, MCLK

speed is fixed to HCLKO speed and HCLKI is

generated from MCLKI.

Figure 1-2. STPC Elite clock architecture

IPC

SDRAM controller

North Bridge

14.31818 MHz

XTALO

XTALI

OSC14M

ISACLK

1/4

GPCLK

PLL

(14MHz)

1/2

HCLK

PLL

PCICLKI

PCICLKO

South Bridge

1/2

1/3

HCLK

MCLK

PLL

MCLKI

MCLKO

CPU

Local Bus

Host

ISA

HCLKI

HCLKO

STPCE1HDBC 数据表(PDF) 8 Page - STMicroelectronics

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