GENERAL DESCRIPTION

The SMSC LPC47N227 is a 3.3V PC 99 and ACPI 1.0b compliant Super I/O Controller. The LPC47N227 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 also includes 29 GPIO pins.

FEATURES

◾ 3.3 Volt Operation (5V Tolerant)

◾ PC99 and ACPI 1.0b Compliant

◾ Programmable Wakeup Event Interface (nIO_PME Pin)

◾ SMI Support (nIO_SMI Pin)

◾ GPIOs (29)

◾ Two IRQ Input Pins

◾ XNOR Chain

◾ 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

- Supports One Floppy Drive Directly

- 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

- Swap Drives A and B

- Non-Burst Mode DMA Option

- 48 Base I/O Address, 15 IRQ and 3 DMA Options

- Forceable Write Protect and Disk Change Controls

◾ Floppy Disk Available on Parallel Port Pins (ACPI Compliant)

◾ Enhanced Digital Data Separator

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

- Programmable Precompensation Modes

◾ 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

◾ Infrared Communications Controller

- IrDA v1.2 (4Mbps), HPSIR, ASKIR, Consumer IR Support

- 2 IR Ports

- 96 Base I/O Address, 15 IRQ Options and 3 DMA Options

◾ 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

- 192 Base I/O Address, 15 IRQ and 3 DMA Options