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PC87570-ICC/VPC
Keyboard and Power Management Controller [Life-time buy]
- January 1998
Highlights
PRELIMINARYApril 1998
PC87570 Keyboard and Power Management Controller
Highlights
General DescriptionThe 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®
(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 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
Core Bus
Peripheral BusBus
KBC + PM
Host I/F
RTC +
Processing
UnitHBI
Host Bus
APCHost
Config
RAM
MemoryExternal
BIU
CR16A Core
ICUHFCG
PMC ADC
KBSCAN ACBGPIO
WDG
Peripherals
LegacyROM
MIWUTMTM®
Memory(ISA Compatible)
MFT16
Timer +
KHz
Adapter
PS/2
I/F
I/F
CLK
DAC
+ I/O
(X2)
