PC87570 Datasheet, PDF (1/168 Pages) National Semiconductor (TI) – PC87570 Keyboard and Power Management Controller

- January 1998
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’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^® Interface, ACCESS.bus^®
Block Diagram
(ACB) Interface, two Multi-Function 16-Bit Timers (MFT16),
periodic interrupt timer and WATCHDOG™ (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
q _{Shared BIOS memory}
q _{Fully ACPI-compliant embedded controller}
q _{Proprietary PS/2 shift mechanism}
q _{Extremely low current consumption in Idle mode}
q _{Support for a variety of off-chip wake-up sources}
q _{Scalable design for growth without controller upgrade}
CR16A Core
Processing
Unit
Core Bus
Memory
Bus
Adapter
RAM
ROM
BIU
Peripheral Bus
Host KBC + PM RTC +
Config Host I/F ^APC
Legacy
HBI
HFCG
ICU
GPIO
KBSCAN
ACB
I/F
Timer +
WDG
DAC
PMC
CLK
Peripherals
MIWU
PS/2
I/F
MFT16
(X2)
ADC
Host Bus
32.768
(ISA Compatible) KHz
CompactRISC^TM, WATCHDOG^TM and TRI-STATE^® are trademarks of National Semiconductor Corporation.
IBM^®, PC-AT^® and PS/2^® are registered trademarks of International Business Machines Corporation.
ACCESS.bus^® is a registered trademark of Digital Equipment Corporation.
I²C^® is a registered trademark of Philips.
© 1998 National Semiconductor Corporation
1
External
Memory
+ I/O
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