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.

FEATURES
· 3.3 Volt Operation (5V Tolerant)
· LPC Interface
· Floppy Disk Controller (Supports 2 FDCs)
· Multi-Mode Parallel Port
· One Full Function UART
· MPU-401 MIDI UART
· 8042 Keyboard Controller
· Dual Game Port
· SMBus Controller
· Programmable Wakeup Event Interface (nIO_PME Pin)
· SMI Support (nIO_SMI Pin)
· GPIO Pins (37)
· 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 SMSC's 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 Port
- One Full Function Serial Port
- High Speed NS16C550 Compatible UART with Send/Receive 16-Byte FIFOs
- Supports 230k and 460k Baud
- Programmable Baud Rate Generator
- Modem Control Circuitry
- 480 Address and 15 IRQ Options
- Second UART for MPU-401 MIDI Interface