PC87570-ICC/VUL Datasheet

IC型號(hào)：
PC87570-ICC/VUL
PDF描述：
PC87570 Keyboard and Power Management Controller
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1116.34KB
PDF頁(yè)數(shù)：
168頁(yè)
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- January 1998

Highlights

PRELIMINARY

April 1998

PC87570 Keyboard and Power Management Controller

Highlights

General Description

The PC87570 is a highly integrated embedded RISC-based

controller optimized for power management (PM), keyboard

and mouse (KBC) and system control in portable Personal

Computer (PC) applications.

The PC87570 incorporates National鈥檚 CompactRISC鈩?/div>

CR16A core, a high performance 16-bit RISC processor

core, a Bus Interface Unit (BIU) that directly interfaces with

memory and I/O devices, on-chip memory and system sup-

port functions. Among these are legacy functions, handled

by the Host Bus Interface (HBI), that include the Real-Time

Clock and Advanced Power Control (RTC and APC), and

peripherals, including: frequency-multiplier-based High Fre-

quency Clock Generator (HFCG), Power Mode Control

(PMC), Interrupt Control Unit (ICU), Multi-Input Wake-Up

(MIWU), General Purpose I/O Ports (GPIO) with internal

keyboard matrix scanning, PS/2

廬

Interface, ACCESS.bus

廬

(ACB) Interface, two Multi-Function 16-Bit Timers (MFT16),

periodic interrupt timer and WATCHDOG鈩?(TWD), ADC

and DAC.

The PC87570 highly efficient architecture and its on-chip

peripherals, supporting functions and low power consump-

tion, provide a highly integrated solution for portable note-

book PCs, sub-notebook PCs and other portable devices.

Outstanding Features

Shared BIOS memory

Fully ACPI-compliant embedded controller

Proprietary PS/2 shift mechanism

Extremely low current consumption in Idle mode

Support for a variety of off-chip wake-up sources

Scalable design for growth without controller upgrade

Block Diagram

CR16A Core

Processing

Unit

Core Bus

Bus

Adapter

Memory

RAM

ROM

BIU

Peripheral Bus

Host

Config

KBC + PM

Host I/F

RTC +

APC

GPIO

KBSCAN

MIWU

CLK

HFCG

ICU

ACB

I/F

PS/2

I/F

Timer +

WDG

MFT16

(X2)

ADC

DAC

Legacy

PMC

HBI

Peripherals

Host Bus

(ISA Compatible)

32.768

KHz

External

Memory

+ I/O

CompactRISC

, WATCHDOG

and TRI-STATE

廬

are trademarks of National Semiconductor Corporation.

IBM

廬

, PC-AT

廬

and PS/2

廬

are registered trademarks of International Business Machines Corporation.

ACCESS.bus

廬

is a registered trademark of Digital Equipment Corporation.

廬

is a registered trademark of Philips.

漏

1998 National Semiconductor Corporation

www.national.com

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