PC87591E Datasheet, PDF (1/437 Pages) National Semiconductor (TI) – LPC Mobile Embedded Controllers

PRELIMINARY
March 2004
Revision 1.07
PC87591E, PC87591S and PC87591L
LPC Mobile Embedded Controllers
General Description
The National Semiconductor PC87591E, PC87591S and
PC87591L are highly integrated, embedded controllers with
an embedded-RISC core and integrated advanced func-
tions. These devices are targeted for a wide range of porta-
ble applications that use the Low Pin Count (LPC) interface.
The PC87591S is targeted for security applications and in-
cludes supporting hardware such as the Hardware Random
Number Generator. The PC8591L replaces the on-chip
flash with 4K of boot ROM for value solutions using shared
BIOS architecture. “PC87591x” refers to all the devices.
The PC87591x incorporates National’s CompactRISC^
CR16B core (a high-performance 16-bit RISC processor),
on-chip flash (ROM for the PC87591L) and RAM memories,
system support functions and a Bus Interface Unit (BIU) that
directly interfaces with optional external memory (such as
flash) and I/O devices.
System support functions include: WATCHDOG and other
timers, interrupt control, general-purpose I/O (GPIO) with
internal keyboard matrix scanning, PS/2^® Interface,
ACCESS.bus^® interface, high accuracy analog-to-digital
(ADC) and digital-to-analog converters (DAC) for battery
charging, system control, system health monitoring and an-
alog controls.
The PC87591x interfaces with the host via an LPC interface
that provides the host with access to the Keyboard and em-
bedded controller interface channels, integrated functions,
Real-Time Clock (RTC), BIOS firmware and security func-
tions.
Like members of National’s SuperI/O family, the PC87591x
is PC01 and ACPI compliant.
Outstanding Features
■ Host interface, based on Intel’s LPC Interface Specifi-
cation Revision 1.0, September 29th, 1997
■ PC01 Rev 1.0, and ACPI 2.0 compliant
■ 16-bit RISC core, with 2 Mbyte address space, and
running at up to 20 MHz
■ Software and Hardware controlled clock throttling
■ Shared BIOS flash memory (internal and/or external)
■ Y2K-compliant RTC
■ 84/117 GPIO ports (for 128-pin/176-pin packages)
with a variety of wake-up events
■ Extremely low current consumption in Idle mode
■ JTAG-based debugger interface
■ 128-pin and 176-pin options, in LQFP package
(PC87591L is 176-pin only)
Block Diagram
LPC Serial
I/F IRQ SMI
Reset &
Config
CR16B Core
Processing
Unit
DMA
Host
Controlled
Functions
Core Bus
I/F Functions
Memory
LPC Bus I/F
CR Access Shared mem. Bus
Bridge
+ Security Adapter
RAM
FLASH or ROM
BIU
Internal Bus
Peripheral Bus
Peripherals
KBC + PM
Host I/F
MSWC
HFCG
ICU
KBSCAN +
ACM
GPIO
ACB
(X2)
Timer +
WDG
ADC USART
RTC
32.768 KHz
PMC
MIWU
CLK
Debugger PS/2
I/F
I/F
MFT16
(X2)
PWM
DAC
JTAG
External
Memory + I/O
National Semiconductor is a registered trademark of National Semiconductor Corporation. All other brand or product names are trademarks or registered trademarks of their respective holders.
© 2004 National Semiconductor Corporation
www.national.com