LPC47B277-MS

Product Summary

The LPC47B27x* is a 3.3V PC98/PC99 compliant Super I/O controller. The LPC47B27x implementsthe LPC interface, a pin reduced ISA bus interface which provides the same or better performance asthe ISA/X-bus with a substantial savings in pins used. The LPC47B27x provides fan control throughtwo fan speed control output pins and two fan tachometer input pins. It also provides 37 generalpurpose input/output (GPIO) pins, a dual game port interface, MPU-401 MIDI support and ISA IRQ toSerial IRQ conversion.The LPC47B27x incorporates a keyboard interface, SMSC''s true CMOS 765B floppy disk controller,advanced digital data separator, two 16C550A compatible UARTs, one Multi-Mode parallel port whichincludes ChiProtect circuitry plus EPP and ECP, on-chip 12 mA AT bus drivers, one floppy direct drivesupport, and Intelligent Power Management including PME support. The true CMOS 765B coreprovides 100% compatibility with IBM PC/XT and PC/AT architectures in addition to providing dataoverflow and underflow protection. The SMSC advanced digital data separator incorporates SMSC''spatented data separator technology, allowing for ease of testing and use. Both on-chip UARTs arecompatible with the NS16C550A. The parallel port is compatible with IBM PC/AT architecture, as wellas IEEE 1284 EPP and ECP. The LPC47B27x incorporates sophisticated power control circuitry (PCC)which includes support for keyboard, mouse and consumer infrared wake-up events. The PCCsupports multiple low power-down modes.The LPC47B27x supports the ISA Plug-and-Play Standard register set (Version 1.0a) and provides therecommended functionality to support Windows ''95. The I/O Address, DMA Channel and hardwareIRQ of each logical device in the LPC47B27x may be reprogrammed through the internal configurationregisters. There are 480 (960 for Parallel Port) I/O address location options, a Serialized IRQ interface,and three DMA channels.

Parametrics

Specifications of LPC47B277-MS
Pin Count	100	Lead Free Status / RoHS Status	Compliant

Features

3.3 Volt Operation, 5 Volt TolerantLPC InterfaceFan Control— Fan Speed Control Outputs (2)— Fan Tachometer Inputs (2)Programmable Wake-up Event InterfacePC98, PC99, and ACPI 1.0 CompliantDual Game Port InterfaceMPU-401 MIDI SupportGeneral Purpose Input/Output Pins (37)ISA IRQ to Serial IRQ ConversionISA Plug-and-Play Compatible Register SetIntelligent Auto Power ManagementSystem Management Interrupt2.88MB Super I/O Floppy Disk Controller— Licensed CMOS 765B Floppy Disk Controller— Software and Register Compatible with SMSC''sProprietary 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) IncludingMultiple Powerdown Modes for Reduced PowerConsumption— DMA Enable Logic— Data Rate and Drive Control Registers— 480 Address, Up to 15 IRQ and Three DMA OptionsFloppy Disk Available on Parallel Port PinsEnhanced Digital Data Separator— 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbps DataRates— Programmable Precompensation ModesSMSC LPC47B27xLPC47B27x100 Pin EnhancedSuper I/O Controllerwith LPC InterfaceKeyboard Controller— 8042 Software Compatible— 8 Bit Microcomputer— 2k Bytes of Program ROM— 256 Bytes of Data RAM— Four Open Drain Outputs Dedicated forKeyboard/Mouse Interface— Asynchronous Access to Two Data Registers and OneStatus 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 Package; lead-free RoHS compliant package also available

Diagrams