GENERAL DESCRIPTION

The LPC47N252 is a 208-pin 3.3V LPC-based ACPI 1.1 and PC99/PC2001 compliant Notebook I/O Controller with Fast Infrared for mobile applications.

FEATURES

■ 3.3V Operation with 5V Tolerant Buffers

■ ACPI 1.1, PC99/PC2001 Compliant

■ LPC Interface with Clock Run Support

? Serial IRQ Interface Compatible with Serialized IRQ Support for PCI Systems

? 15 Direct IRQs

? Four 8-Bit DMA Channels

? ACPI SCI Interface

? nSMI

? Shadowed write only registers

■ Internal 64K Flash ROM

? Programmed From Direct Parallel Interface, 8051, or LPC Host

? 2k-Byte Lockable Boot Block

? Can be Programmed Without 8051 Intervention

■ Three Power Planes

? Low Standby Current in Sleep Mode

? Intelligent Auto Power Management for Super I/O

■ ACPI Embedded Controller Interface

■ Configuration Register Set Compatible with ISA Plug-and-Play Standard (Version 1.0a)

■ High-Performance Embedded 8051 Keyboard and System Controller

? Provides System Power Management

? System Watch Dog Timer (WDT)

? 8042 Style Host Interface

? Supports Interrupt and Polling Access

? 256 Bytes Data RAM

? On-Chip Memory-Mapped Control Registers

? Access to RTC and CMOS Registers

? Up to 16x8 Keyboard Scan Matrix

? Two 16 Bit Timer/Counters

? Integrated Full-Duplex Serial Port Interface

? Eleven 8051 Interrupt Sources

? Thirty-Two 8-Bit, Host/8051 Mailbox Registers

? Thirty-six Maskable Hardware Wake-Up Events

? Fast GATEA20

? Fast CPU_RESET

? Multiple Clock Sources and Operating Frequencies

? IDLE and SLEEP Modes

? Fail-Safe Ring Oscillator

■ Advanced Infrared Communications Controller (IrCC 2.0)

? IrDA V1.2 (4Mbps), HPSIR, ASKIR, Consumer IR Support

? Two IR Ports

? Relocatable Base I/O Address

■ Real-Time Clock

? MC146818 and DS1287 Compatible

? 256 Bytes of Battery Backed CMOS in Two 128-Byte Banks

? 128 Bytes of CMOS RAM Lockable in 4x32 Byte Blocks

? 12 and 24 Hour Time Format

? Binary and BCD Format

? <2μA Standby Current (typ)

■ Two 8584-Style ACCESS.Bus Controllers

? 8051 Controlled Logic Allows ACCESS.Bus Master or Slave Operation

? ACCESS.Bus Controllers are Fully Operational on Standby Power

? 2 Sets of Dedicated Pins per ACCESS.Bus Controller

■ Four independent Hardware Driven PS/2 Ports

■ 83 General Purpose I/O Pins

? 36 Maskable Hardware Wake-Event Capable

? 18 Programmable Open-Drain/Push-Pull Outputs

? 16 Mapped into 8051 SFR Space

? 24 LPC/8051-Addressable

■ Three Programmable Pulse-Width Modulator Outputs

? Independent Clock Rates

? 6 Bit Duty Cycle Granularity

? VCC1 and VCC2 operation mode

■ Dual Fan Tachometer Inputs

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