PC87413 datasheet(4/257 Pages) NSC

4 / 257 page

Features (Continued)

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Revision 1.2

Watchdog

— Watchdog counter reset by:

❏

Serial Ports Interrupts

❏

Keyboard and Mouse Interrupts

❏

Software control

— 8-bit counter with 1 minute LSB

— Generates a 250 ms pulse at WDO pin

— Programmable SIOSMI or SIOSCI events

Clocking, Supply and Package Information

Strap Input Controlled Operating Modes

— Base Address (BADDR) for the PnP Index-Data

— Input clock presence (CKIN48) select

— X-Bus conﬁguration (XCNF2-0) select (PC87413

and PC87417)

— ACCESS.bus

slave

address

(ACBSA)

select

(PC87416 and PC87417)

— TRI-STATE device pins (TRIS)

Clocks

— LPC clock input (up to 33 MHz)

— ServerI/O modules clock input: 48 MHz or no clock

— Single 32.768 KHz crystal

— On-chip low-frequency clock generator:

❏

32.768 KHz for RTC, System Wake-Up Control

(SWC), Power Active timers and the high-fre-

quency clock generator

❏

Very low power consumption

❏

VBAT powered

— On-chip high-frequency clock generator:

❏

Based on the 32.768 KHz clock

❏

VSB powered

— Clock outputs:

❏

LFCKOUT: 32.768 KHz or 1 Hz

❏

HFCKOUT: 48 MHz or 40 MHz (or divided)

Protection

— All pins are 5V tolerant and back-drive protected

(except the LPC bus pins)

— Separate battery pin that includes an internal UL

protection resistor

— GPIO multiplexing conﬁguration lock

Power Supply

— 3.3V supply operation

— Separate pins for main (VDD) and standby (VSB)

power supplies

— Backup battery input for RTC, SWC and Power

Active timers

— Reduced standby power consumption

— Very low power consumption for RTC and timers

(0.9

µA typical) from backup battery

Package

— 128-pin PQFP

Device-Speciﬁc Information

The following table shows the main features for each device in the PC8741x family.

Function1,2

1. This Datasheet contains notes that are device speciﬁc.

2. The “not implemented” functions must not be accessed by the host/controller, because correct

operation is not guaranteed.

PC87413

PC87414

PC87416

PC87417

LPC Bus Interface

YES

X-Bus Extension

YES

ACCESS.bus Interface

YES

General-Purpose Input/Output Ports (GPIO)

YES

Real Time Clock (RTC)

YES

System Wake-Up Control (SWC)

YES

Legacy Functional Blocks

YES

PC87413 数据表(PDF) 4 Page - National Semiconductor (TI)

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