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PC87591L-VPCN05
LPC Mobile Embedded Controllers
PC87591L-N05 LPC Mobile Embedded Controller
PRELIMINARYApril 2004
Revision 1.2
PC87591L-N05
LPC Mobile Embedded Controller
General DescriptionThe National Semiconductor PC87591L-N05isa highlyin-
tegrated embedded controller withan embedded RISC core
and integrated advanced functions. This deviceis targeted
fora wide rangeof portable applications that use the Low
Pin Count (LPC) interface. this datasheet, referencesto the PC87591L-N05 include
the PC87591L-VPCN05 and PC87591L-SLCN05.
The PC87591L-N05 incorporatesthe National CompactRISC
CR16B core(a high-performance 16-bit RISC processor),
on-chip ROM and RAM memories, system support func-
tions anda Bus Interface Unit (BIU) that directly interfaces
with external memory (such as flash) and I/O devices.
System support functions include: watchdog, PWM, timers,
interrupt control, General-Purpose I/O (GPIO) with internal
keyboard matrix scanning, PS/2® Interface, ACCESS.bus®
interface and high-accuracy analog-to-digital (ADC) and
digital-to-analog(DAC) convertersfor battery charging, sys-
tem control, system health monitoring and analog controls.
The PC87591L-N05 interfaces with the hostviaan LPC inter-
face that provides the host with accessto the following: Key-
board and embedded controller interface channels, integrated
functions, Real-Time Clock (RTC) and BIOS firmware.
Like other membersof the National SuperI/O family, the
PC87591L-N05 is PC01 and ACPI compliant.
Outstanding Features Host interface, based on Intel’s LPC Interface
Specification Revision 1.1, August 2002 PC01 Rev 1.0, and ACPI 2.0 compliant 16-bit RISC core, with2 Mbytes address space,
runningatupto20 MHz JTAG-based debugger interface Shared BIOS flash memory (external) 92 GPIO ports (including keyboard scanning) witha
varietyof wake-up events Software- and hardware-controlled clock throttling, and
extremely low current consumptionin Idle mode 176-pin LQFP and FBGA packages
Block Diagram
Core Bus
Peripheral BusBus
KBC + PMHost I/F
RTC
Processing
UnitRAM
External
BIU
CR16B Core
32.768 KHz
ICUHFCG
PMC
ADCACBGPIO WDG
ROM
MIWU
Memory + I/O
MFT16
Timer +
Adapter
PS/2
I/F
(X4)
DAC(X2)
MemoryDebugger
I/F
Shared mem.+ Protection
LPC
I/F
Serial
IRQ SMI
Functions
Internal BusCR Access
DMA
JTAG
KBSCAN +
ACM
USART
PeripheralsLPC Bus I/F
I/F FunctionsPWM
Reset &
Config
MSWC
Bridge
Controlled
Host(X2)
CLK
