PC87413 datasheet(3/257 Pages) NSC

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Features (Continued)

Revision 1.2

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— Supports fast tape drives (2 Mbps) and standard

tape drives (1 Mbps, 500 Kbps and 250 Kbps)

Keyboard and Mouse Controller (KBC)

— 8-bit

microcontroller,

software

compatible

with

8042AH and PC87911

— Standard interface (60h, 64h, IRQ1 and IRQ12)

— Supports two external swapable PS/2 interfaces for

keyboard and mouse

— Five programmable, dedicated, open-drain I/O lines

(Fast GA20/P21, KBRST/P20, P12, P16, P17)

General-Purpose Modules

General-Purpose I/O (GPIO) Ports

— 51 GPIO Ports:

❏

Individually assigned to either LPC or ACB con-

trol (PC87413 and PC87417)

❏

46 individually conﬁgured as input or output

❏

Five output-only

— Programmable features for each output pin:

❏

Drive type (open-drain, push-pull or TRI-STATE)

❏

TRI-STATE on VDD-fall detection for pins driving

VDD-supplied devices

— Programmable option for internal pull-up resistor on

each input pin

— Lock option for the conﬁguration and data of each

output pin

— 16 GPIO ports generate IRQ/SIOSMI/SIOSCI for

wake-up events, with individual:

❏

Enable control

❏

Polarity and edge/level selection

❏

Debounce mechanism

— VSB powered

— Low-cost external GPIO port expansion via X-Bus

(PC87416 and PC87417)

Real-Time Clock (RTC)

— DS1287, MC146818 and PC87911 compatible

— 242-byte battery backed-up CMOS RAM in two

banks (accessed through 70-71h and 72-73h)

— Selective lock mechanisms for the RTC RAM

— Y2K-compliant calendar, including century and

automatic leap-year adjustment

— Time of day in seconds, minutes and hours that al-

lows a 12-hour or 24-hour format with optional

adjustment for daylight saving time

— BCD or binary format for timekeeping

— Four individually maskable interrupt event ﬂags:

❏

Periodic rates from 122

µs to 500 ms

❏

Day-of-month alarm

❏

Time-of-day alarm

❏

Once-per-second to once-per-day

— Double-buffer time registers

Power Management

Supports ACPI Specification Revision 1.0b, Feb. 2, 1999

System Wake-Up Control (SWC)

— Wake-up request on detection of:

❏

Preprogrammed Keyboard or Mouse sequence

❏

External modem ring from RI1 or RI2 on serial

ports

❏

Predetermined RTC date and time alarm

❏

General-Purpose Input Events from up to 16

GPIO pins

❏

IRQs of internal logical devices

— Optional routing of power-up request to SERIRQ,

SIOSMI, SIOSCI, PWBTOUT and ONCTL

— Routing control per input/output event combination

— Outputs enable/disable per event and system state

combination (ACPI Sx states)

— Implements bank “b” of the ACPI registers

— Suspend modes via software emulation (control)

— Battery-backed event-logic conﬁguration

— Power button support, featuring:

❏

On/Off control

❏

Power-off, 4-second override

❏

Power button output

— Sleep Button support

Power Supply On/Off control

— Supports Legacy- and ACPI-compatible Power

button

— Direct power supply control in response to wake-up

events

— Programmable Crowbar time-out for On request

— On/Off control via software emulation

— Power-fail recovery

Enhanced Power Management (PM), including:

— Special conﬁguration registers for power down

— Reduced current leakage from pins

— Low-power CMOS technology

— Ability to disable all modules

Keyboard Events

— Wake-up on any key

— Supports programmable 8-byte sequence “pass-

word” for Power Management

— Simultaneous recognition of three programmable

keys (sequences): “Power”, “Sleep” and “Resume”

Power Active Timers

— Two power-on, elapsed-time counters for the main

(VDD) and standby (VSB) power supplies

— 32-bit counters with 1 second LSB

— VBAT backed-up counters

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