GENERAL DESCRIPTION

The LPC47B37x* is a 3.3V PC99 compliant Super I/O controller. The LPC47B37x implements the LPC interface, a pin reduced ISA interface which provides the same or better performance as the ISA/X-bus with a substantial savings in pins used. The part provides 39 GPIO pins, an SMBus controller and ISA IRQ to serial IRQ conversion. The part also provides a fan speed control output and a fan tachometer input.

FEATURES

? 3.3 Volt Operation (5V Tolerant)

? Floppy Disk Controller (Supports 2 FDCs)

? Multi-Mode Parallel Port

? Two UARTs

? 8042 Keyboard Controller

? SMBus Controller

? Programmable Wakeup Event Interface (nIO_PME Pin)

? SMI Support (nIO_SMI Pin)

? GPIOs (39)

? Fan Speed Control Output

? Fan Tachometer Input

? ISA IRQ to Serial IRQ Conversion

? XNOR Chain

? PC99 and ACPI 1.0 Compliant

? ISA Plug-and-Play Compatible Register Set

? Intelligent Auto Power Management

? 2.88MB Super I/O Floppy Disk Controller

- Licensed CMOS 765B Floppy Disk Controller

- Software and Register Compatible with SMSCs Proprietary 82077AA Compatible Core

- Configurable Open Drain/Push-Pull Output Drivers

- Supports Vertical Recording Format

- 16-Byte Data FIFO

- 100 IBM? Compatibility

- Detects All Overrun and Underrun Conditions

- Sophisticated Power Control Circuitry (PCC) Including Multiple Powerdown Modes for Reduced Power Consumption

- DMA Enable Logic

- Data Rate and Drive Control Registers

- 480 Address, up to 15 IRQ and 3 DMA Options

? Enhanced Digital Data Separator

- 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbps Data Rates

- Programmable Precompensation Modes

? Keyboard Controller

- 8042 Software Compatible

- 8-Bit Microcomputer

- 2k Bytes of Program ROM

- 256 Bytes of Data RAM

- Four Open Drain Outputs Dedicated for Keyboard/Mouse Interface

- Asynchronous Access to Two Data Registers and One Status Register

- Supports Interrupt and Polling Access

- 8-Bit Counter Timer

- Port 92 Support

- Fast Gate A20 and KRESET Outputs

? Serial Ports

- Two Full Function Serial Ports

- High Speed NS16C550 Compatible UARTs with Send/Receive 16-Byte FIFOs

- Supports 230k and 460k Baud

- Programmable Baud Rate Generator

- Modem Control Circuitry

- 480 Address and 15 IRQ Options

- IrDA 1.0, HP-SIR, ASK IR Support

? Multi-Mode Parallel Port with ChiProtect?

- Standard Mode IBM PC/XT?, PC/AT?, and PS/2? Compatible Bidirectional Parallel Port

- Enhanced Parallel Port (EPP) Compatible - EPP 1.7 and EPP 1.9 (IEEE 1284 Compliant)

- IEEE 1284 Compliant Enhanced Capabilities Port (ECP)

- ChiProtect Circuitry for Protection Against Damage Due to Printer PowerOn

- 480 Address, up to 15 IRQ and 3 DMA Options

? LPC Bus (Pin Reduced ISA) Host Interface

- Multiplexed Command, Address and Data Bus

- 8-Bit I/O Transfers

- 8-Bit DMA Transfers

- 16-Bit Address Qualification

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

- Power Management Event (nIO_PME) Interface Pin

? 100 Pin QFP Package