Revision 1.1

3

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Features (Continued)

— Provides interrupt on system events (via MSWC)

❏

External modem ring on RI

❏

IRQ from Keyboard, Mouse and PM channels

❏

Software-triggered event

❏

System ACPI sleep-state change

❏

Power Button mode change

❏

Legacy software “Off” command

■

Multi-Input Wake-Up (MIWU)

— Supports up to 20 wake-up inputs

— Provides user-selectable trigger conditions

— Provides wake-up on activity of external pins

❏

General-purpose wake-up inputs

❏

Power switch input

❏

Keyboard scan inputs

— Generates wake-up event to Power Management

Controller (PMC)

— Generates interrupts to ICU

■

General-Purpose I/O (GPIO)

— 92 port pins (including keyboard scanning)

— I/O pins individually configured as input or output

— Optional internal pull-up resistors on inputs

— Special ports for internal keyboard matrix scanning

❏

16 open-collector outputs

❏

Eight Schmitt inputs with internal pull-ups

— Dedicated input for system On/Off switch

— External GPIO expansion through the

BIU I/O Expansion protocol

■

PS/2 Interface

— Supports four external ports for: external keyboard,

mouse and two additional pointing devices

— Supports byte-level handling via hardware accelera-

tor

■

Two ACB Interface modules. Each module:

— Is Intel SMBus and Philips I2C® compatible

— Is SMBus master and slave

— Detects four simultaneous slave addresses (two

user-defined, broadcast and ARP)

— Supports polling and interrupt controlled operation

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

Condition (while in Idle mode)

— Has an optional internal pull-up on SDA and SCL pins

■

Universal Synchronous/Asynchronous Receiver-Trans-

mitter (USART)

— Supports full-duplex USART communication

— Has programmable baud rate

— Supports polling and interrupt controlled data transfer

— Supports synchronous mode with either internal or

external clock

— Supports 9-bit Attention mode

■

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

each module:

— Contains two 16-bit timers

— Supports Pulse Width Modulation (PWM), Capture

and Counter

■

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

■

Pulse Width Modulation (PWM) Module

— Eight outputs

— 8/16-bit duty cycle resolution

— 8/16-bit common input clock prescaler

■

Analog to Digital Converter (ADC)

— Five voltage channels (four external and one

internal), with 8-bit resolution

— Sigma-delta technology for high noise rejection

— Internal voltage reference

— Every 100 ms, three of the five channels are measured

■

Digital to Analog Converter (DAC)

— Four channels with 8-bit resolution

— Rail-to-Rail output range, from AGND to AVCC

— 1

µs conversion time

Host-Core Interface Functions

■

Host Bus Interface (HBI)

— Comprises three host interface ports, typically used

for KBC and ACPI EC channels:

❏

One 8042 KBC-standard, interface (legacy 6016,

6416).

❏

Two PM interface ports (legacy 6216, 6616 and

6816, 6C16).

These provide ACPI Embedded Controller sup-

port with either “Shared” or “Private” interface

(regarding SCI/SMI generation).

— Generates IRQ (with Legacy support), SMI and SCI

— Provides Fast Gate A20 and Fast Keyboard Reset

via firmware

■

Core Access to Host-Controlled Functions

— Host-Core arbitration of function control

— Host access blocked by the core via lock bits