ADP315PC87570 National Semiconductor, ADP315PC87570 Datasheet

ADP315PC87570

Manufacturer Part Number

ADP315PC87570

Description

Keyboard and Power Management Controller

Manufacturer

National Semiconductor

Datasheet

1.ADP315PC87570.pdf (168 pages)

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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’s CompactRISC

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

Block Diagram

CompactRISC

IBM

ACCESS.bus

1998 National Semiconductor Corporation

, PC-AT

is a registered trademark of Philips.

Config

Host

(ISA Compatible)

Host Bus

and PS/2

is a registered trademark of Digital Equipment Corporation.

Adapter

, WATCHDOG

Bus

KBC + PM

HBI

Host I/F

Legacy

are registered trademarks of International Business Machines Corporation.

and TRI-STATE

RTC +

APC

32.768

KHz

Interface, ACCESS.bus

Memory

Peripherals

HFCG

CR16A Core

are trademarks of National Semiconductor Corporation.

PMC

Peripheral Bus

RAM

- January 1998

CLK

ICU

Processing

MIWU

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

periodic interrupt timer and WATCHDOG

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

Unit

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

KBSCAN

ROM

GPIO

Core Bus

PS/2

I/F

ACB

I/F

MFT16

(X2)

Timer +

BIU

WDG

PRELIMINARY

ADC

April 1998

(TWD), ADC

DAC

www.national.com

External

Memory

+ I/O

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