Microchip Technology LPC47B277-MS

GENERAL DESCRIPTION

The LPC47B27x* is a 3.3V PC98/PC99 compliant Super I/O controller. The LPC47B27x implements the LPC interface, a pin reduced ISA bus interface which provides the same or better performance as the ISA/X-bus with a substantial savings in pins used. The LPC47B27x provides fan control through two fan speed control output pins and two fan tachometer input pins. It also provides 37 general purpose input/output (GPIO) pins, a dual game port interface, MPU-401 MIDI support and ISA IRQ to Serial IRQ conversion.

FEATURES

• 3.3 Volt Operation, 5 Volt Tolerant
• LPC Interface
• Fan Control
- Fan Speed Control Outputs (2)
- Fan Tachometer Inputs (2)
• Programmable Wake-up Event Interface
• PC98, PC99, and ACPI 1.0 Compliant
• Dual Game Port Interface
• MPU-401 MIDI Support
• General Purpose Input/Output Pins (37)
• ISA IRQ to Serial IRQ Conversion
• ISA Plug-and-Play Compatible Register Set
• Intelligent Auto Power Management
• System Management Interrupt
• 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 Two Floppy Drives 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
- 480 Address, Up to 15 IRQ and Three DMA Options
• Floppy Disk Available on Parallel Port Pins
• 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 NS16C550A 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
• Infrared Port
- Multiprotocol Infrared Interface
- 32-Byte Data FIFO
- IrDA 1.0 Compliant
- Consumer IR
- SHARP ASK IR
- 480 Address, Up to 15 IRQ and Three 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
- 960 Address, Up to 15 IRQ and Three DMA Options
• LPC Interface
- Multiplexed Command, Address and Data Bus
- Serial IRQ Interface Compatible with Serialized IRQ Support for PCI Systems
- PME Interface
• 100 Pin QFP Lead-Free RoHS Compliant Package