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Partno	Mfg	Dc	Qty	Available	Descript
PC87591S-VLB \|PC87591SVLB	NS	N/a	50	avai	LPC Mobile Embedded Controllers

PC87591S-VLB ,LPC Mobile Embedded ControllersFeatures (Continued)■ Interrupt Control Unit (ICU) ■ Pulse Width Modulation (PWM) Module— 31 maskab ..
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PEB22522FV2.1 ,MULTI BIT RATE INTEGRATED CIRCUIT MDSL (Medium bit rate Digital Using the ..
PEB22522FV2.1 ,MULTI BIT RATE INTEGRATED CIRCUITFeatures

PC87591S-VLB
LPC Mobile Embedded Controllers
PC87591E, PC87591S and PC87591L 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 embedded-RISC core and integrated advanced func-
tions. These devices are targetedfora wide rangeof porta-
ble applications that usethe Low Pin Count (LPC) interface.
The PC87591Sis targetedfor security applications andin-
cludes supporting hardware suchasthe Hardware Random
Number Generator. The PC8591L replaces the on-chip
flash with4Kof boot ROMfor 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 (ROMfor the PC87591L) and RAMmemories,
system support functions and aBus Interface Unit (BIU)that
directly interfaces with optional external memory (suchas
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 withthe hostviaan LPC interface
that provides the host with accessto the Keyboard and em-
bedded controller interface channels, integrated functions,
Real-Time Clock (RTC), BIOS firmware and security func-
tions.
Like membersof National’s SuperI/O family, the PC87591x
is PC01 and ACPI compliant.
Outstanding Features Host interface, basedon 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, with2 Mbyte address space, and
runningatupto20 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)
witha varietyof wake-up events Extremely low current consumptionin Idle mode JTAG-based debugger interface 128-pin and 176-pin options, package
(PC87591Lis 176-pin only)
Block Diagram
Core Bus
Peripheral Bus
Bus
KBC + PMHost I/F
RTC
Processing
Unit
RAM
BIU
CR16B Core
ICUHFCG
PMC
ADCACBGPIO WDG
FLASH or ROM
MIWU
MFT16
Timer +
Adapter
PS/2
I/F
(X2)
CLK
DAC(X2)
Memory
Debugger
I/F
Shared mem.+ Security
LPC
I/F
Serial
IRQ SMI
Functions
Internal Bus
CR Access
DMA
KBSCAN +
ACM USART
Peripherals
LPC Bus I/F
I/F Functions
PWM
Reset &
Config
MSWC
Bridge
Controlled
Host

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