PC87317 datasheet(2/272 Pages) NSC

2 / 272 page

Highlights

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Features

100% compatibility with PnP requirements specified in

the “

Plug and Play ISA Specification”, ISA, EISA, and

MicroChannel architectures

A special PnP module that includes:

— Flexible IRQs, DMAs and base addresses that meet

the PnP requirements speciﬁed by Microsoft® in

their 1995 hardware design guide for Windows

® and

PnP ISA Revision 1.0A

— PnP ISA mode (with isolation mechanism – Wait for

Key state)

— Motherboard PnP mode

An FDC that provides:

— A modiﬁable address that is referenced by a 16-bit

programmable register

— Software compatibility with the PC8477, which con-

tains a superset of the ﬂoppy disk controller func-

tions in the

µDP8473, the NEC µPD765A and the

N82077

— 13 IRQ channel options

— Four 8-bit DMA channel options

— 16-byte FIFO

— Burst and non-burst modes

— A new, high-performance, internal, digital data sep-

arator that does not require any external ﬁlter com-

ponents

— Support for standard 5.25" and 3.5" floppy disk

drives

— Automatic media sense support

— Perpendicular recording drive support

— Three-mode Floppy Disk Drive (FDD) support

— Full support for the IBM Tape Drive Register (TDR)

implementation of AT and PS/2 drive types

A KBC with:

— A modiﬁable address that is referenced by a 16-bit

programmable register, reported as a ﬁxed address

in resource data

— 13 IRQ options for the Keyboard Controller

— 13 IRQ options for the Mouse Controller

— An 8-bit microcontroller

— Software compatibility with 8042AH and PC87911

microcontrollers

— 2 KB of custom-designed program ROM

— 256 bytes of RAM for data

— Five programmable dedicated open drain I/O lines

for keyboard controller applications

— Asynchronous access to two data registers and one

status register during normal operation

— Support for both interrupt and polling

— 93 instructions

— An 8-bit timer/counter

— Support for binary and BCD arithmetic

— Operation at 8 MHz,12 MHz or 16 MHz (programma-

ble option)

— Customizing by using the PC87323VUL, which in-

cludes a RAM-based KBC, as a development plat-

form

for

keyboard

controller

code

for

the

PC87317VUL

An RTC that has:

— A modiﬁable address that is referenced by a 16-bit

programmable register

— 13 IRQ options, with programmable polarity

— DS1287, MC146818 and PC87911 compatibility

— 242 bytes of battery backed up CMOS RAM in two

banks

— Selective lock mechanisms for the RTC RAM

— Battery backed up century calendar in days, day of

the week, date of month, months, years and century,

with automatic leap-year adjustment

— Battery backed-up time of day in seconds, minutes

and hours that allows a 12 or 24 hour format and ad-

justments for daylight savings time

— BCD or binary format for time keeping

— Three different maskable interrupt ﬂags:

• Periodic interrupts - At intervals from 122 msec

to 500 msec

• Time-of-Month alarm - At intervals from once per

second to once per Month

• Updated Ended Interrupt - Once per second

upon completion of update

— Separate battery pin, 2.4 V operation that includes

an internal UL protection resistor

— 2

µA maximum power consumption during power

down

— Double-buffer time registers

ACPI Controller/Extender that supports the require-

ments of the ACPI spec (rev 1.0):

— Power Management Timer

— Power Button

— Real Time Clock Alarm

— Suspend modes via software emulation

— PnP SCI

— Global Lock mechanism

— General Purpose events

— Date of Month Alarm

— Century byte

An APC that controls the main power supply to the sys-

tem, using open-drain output, as follows:

Power turned on when:

— The RTC reaches a pre-determined wake-up centu-

ry, date and time selection

— A high to low transition occurs on the RI input signals

of the UARTs

— A ring pulse or pulse train is detected on the RING

input signal

— A SWITCH input signal indicates a Switch On event

with a debounce-protection

— Any one of seven programmable Power Manage-

ment external trigger events occur

Powered turned off when:

— A SWITCH input signal indicates a Switch Off event

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