PC87591L datasheet(3/437 Pages) NSC

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Revision 1.07

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Features (Continued)

■

Interrupt Control Unit (ICU)

— 31 maskable vectored interrupts (of which 26 are ex-

ternal)

— General-purpose external interrupt inputs through

MIWU

— Enable and pending indication for each interrupt

— Non-maskable interrupt input

■

Multi-Input Wake-Up (MIWU)

— Supports up to 32 wake-up or interrupt inputs

— Generates wake-up event to PMC (Power Manage-

ment Controller)

— Generates interrupts to ICU

— Provides user-selectable trigger conditions

■

General-Purpose I/O (GPIO)

— 84/117 port pins in 128-pin/176-pin package, re-

spectively.

— I/O pins individually conﬁgured as input or output

— Conﬁgurable internal pull-up resistors

— Special ports for internal keyboard matrix scanning

❏

16 open-collector outputs

❏

Eight Schmitt inputs with internal pull-ups

— Input for system On/Off switch

— 27 external wake-up events

— Low-cost external GPIO expansion through the

BIU I/O Expansion protocol

■

PS/2 Interface

— Supports four external ports: Keyboard, mouse and

two additional pointing devices

— Supports byte-level handling via hardware accelera-

tor

■

Two ACCESS.bus (ACB) Interface modules. Each is:

— Intel SMBus® and Philips I2C® compatible

— ACCESS.bus master and slave

— Up to three simultaneous slave addresses detected

— Supports polling and interrupt controlled operation

— Generates a wake-up signal on detection of a Start

Condition while in Idle mode

— Optional internal pull-up on SDA and SCL pins

■

Two 16-bit Multi Function Timer (MFT16) modules.

Each module:

— Contains two 16-bit timers

— Supports Pulse Width Modulation (PWM), Capture

and Counter

■

Universal Synchronous/ Asynchronous Receiver-trans-

mitter (USART)

— A full-duplex USART channel

— Programmable baud rate

— Data transfer via interrupt or polling

— Synchronous mode with either internal or external

clock

— 7-, 8- or 9-bit protocols.

■

Pulse Width Modulation (PWM) Module

— Eight outputs

— 8-bit duty cycle resolution

— Common input clock prescaler

■

Timer and WATCHDOG (TWM)

— 16-bit periodic interrupt timer with 30

µs resolution

and 5-bit prescaler for system tick and periodic

wake-up tasks

— 8-bit WATCHDOG timer

■

Analog to Digital Converter (ADC)

— Fourteen channels, with 10-bit resolution

— Sigma-delta technology for high noise rejection

— Three voltage measurements and one temperature

measurement every 100 ms

— Internal voltage reference

■

Hardware Monitoring

— Controlled by embedded controller

— System Voltage Measurement

❏

Up to eight external measurement points

❏

Four internal measurement points

❏

Smart power failure detection

— Diode-Based Temperature Measurement

❏

Software-controlled fault detection

❏

Hardware-monitored over-temperature detection

— Production time calibration using ﬂash parameters

■

Digital to Analog Converter (DAC)

— Four channels, 8-bit resolution

— 1

µs conversion time for 50 pF load

— Full output range from AGND to AVCC

■

Analog Comparators Monitor (ACM)

— Eight comparator inputs on KBD scan inputs

— 6-bit input measurement resolution

— Scan and Threshold modes

— Supports low-current system wake-up

■

Development Support Features

— Interface to debugger via JTAG pins

❏

ISE/ADB mode

❏

On-board Debug mode

— Flash programing via JTAG

■

CR16B Access to Host Controlled Functions

— Enabled when host inactive

Host Controlled Functions Features

■

Supports Microsoft® Advanced Power Management

(APM) Speciﬁcations Revision 1.2, February 1996

— Generates the System Management Interrupt (SMI)

■

PC1 and ACPI Compliant

— PnP Conﬁguration Register structure

— Flexible resource allocation for all logical devices

❏

Relocatable base address

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