Note: The LPC47S457 is not recommended for new designs. The SCH4304 is the suggested replacement device for this product.
Features
- 3.3 Volt Operation (5V Tolerant)
- Floppy Disk Controller (Supports Two FDCs)
- Multi-Mode Parallel Port
- Two UARTs
- 8042 Keyboard Controller
- SMBus Controller
- SMBus Access to LCD Interface
- SMBus Serial Port 2 Interface Disable
- SMBus Access to Power On Elapsed Time Counters
- Programmable Slave Address
- X-Bus Interface
- Supports up to Four External I/O Components
- Offers Two Modes of Operation
- Support for Driving LCD Panel Interface Controller
- Supports Port 80h Monitoring
- Programmable Wakeup Event Interface (IO_PME# Pin)
- SMI Support (IO_SMI# Pin)
- GPIOs (55)
- Fan Controller
- One Fan Speed Control Output
- One Fan Tachometer Input
- ISA IRQ to Serial IRQ Conversion
- XNOR Chain for Board Test Mode
- PC2001 and ACPI 2.0 Compliant
- 128 Pin QFP Package
- ISA Plug-and-Play Compatible Register Set
- Intelligent Auto Power Management
- Power On Elapsed Time Counters
- Counter for Main Power
- Counter for Standby Power
- Real Time Clock
- MC146818 and DS1287 Compatible
- 256 Bytes of Battery Backed CMOS in Two 128-Byte Banks
- 128 Bytes of CMOS RAM Lockable in 4x32 Byte Blocks
- 12 and 24 Hour Time Format
- 24-Hour Daily Alarm
- 30-Day Alarm
- Binary and BCD Format
- <1uA Standby Current (typ)
- 2.88MB 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 Four 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 Ports
- Two Full Function Serial Ports
- High Speed NS16C550 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
- IrDA 1.0, HP-SIR, ASK IR Support
- 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
- 960 Address, up to 15 IRQ and Four 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 (PME) Interface Pin
- Power Management
Although the information in this document has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to product descriptions and specifications at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order. Products may contain design defects or errors known as anomalies which may cause a product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC's website at http://www.smsc.com. SMSC and the SMSC logo are registered trademarks of Standard Microsystems Corporation ("SMSC"). Other names mentioned may be trademarks of their respective holders. All claims made herein speak as of the date of this material. The company does not undertake to update such statements.
