GENERAL DESCRIPTION
The LPC47U32x* is a 3.3V PC99 compliant Enhanced Super I/O controller. The LPC47U32x 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 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 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
• 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
• 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
• 128 Pin QFP Package