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LPC47U33X

100 Pin Enhanced Super I/O for LPC Bus with Consumer Features and SMBus Controller

SMSC -> Microchip 

• 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 Power-

On

- 480 Address, up to 15 IRQ and 3 DMA

Options

• Pin Reduced ISA Host Interface (LPC Bus)

- 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

GENERAL DESCRIPTION

The LPC47U33x* is a 3.3V PC99 compliant

Enhanced Super I/O controller. The LPC47U33x

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 37

GPIO pins, a dual game port interface, MPU-

401 MIDI support and ISA IRQ to serial IRQ

conversion. The part also provides a fan speed

control output and a fan tachometer input.

The LPC47U33x incorporates a keyboard

interface, SMSC's true CMOS 765B floppy disk

controller, advanced digital data separator, one

16C550A compatible UART, one MPU-401 MIDI

UART, one Multi-Mode parallel port which

includes ChiProtect circuitry plus EPP and ECP,

and Intelligent Power Management including

ACPI, SMI and PME support. The true CMOS

765B core provides 100% compatibility with IBM

PC/XT and PC/AT architectures in addition to

providing data overflow and underflow

protection. The SMSC advanced digital data

separator incorporates SMSC's patented data

separator technology, allowing for ease of

testing and use. The on-chip UART is

compatible with the NS16C550A. The parallel

port is compatible with IBM PC/AT architecture,

as well as IEEE 1284 EPP and ECP. The

LPC47U33x incorporates sophisticated power

control circuitry (PCC). The PCC supports

multiple low power modes. The LPC47U33x

also incorporates SMBus Controller.

The LPC47U33x supports the ISA Plug-and-

Play Standard (Version 1.0a) and provides the

recommended functionality to support Windows

'95 and PC99. The I/O Address, DMA Channel

and Hardware IRQ of each logical device in the

LPC47U33x may be reprogrammed through the

internal configuration registers. There are 480

I/O address location options, a Serialized IRQ

interface, and three DMA channels. The

LPC47U33x does not require any external filter

components and is therefore easy to use and

offers lower system costs and reduced board

area. The LPC47U33x is software and register

compatible with SMSC's proprietary 82077AA

core.

IBM, PC/XT and PC/AT are registered trademarks and PS/2 is a

trademark of International Business Machines Corporation

SMSC is a registered trademark and Ultra I/O, ChiProtect, and Multi-

Mode are trademarks of Standard Microsystems Corporation

*The “x” in the part number is a designator that changes depending upon the particular BIOS used

inside the specific chip. “2” denotes AMI Keyboard BIOS and “7” denotes Phoenix 42i Keyboard

BIOS.

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