DME1737
Super I/O with Temperature
Sensing, Quiet Auto Fan and
Glue Logic
Product Features
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Data Brief
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General Features
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3.3 Volt Operation (SIO Block is 5 Volt Tolerant)
LPC Interface
Programmable Wake-up Event Interface
PC99, PC2001 Compliant
ACPI 2.0 Compliant
Multiplexed Command, Address and Data Bus
Serial IRQ Interface Compatible with Serialized IRQ
Support for PCI Systems
PME Interface
ISA Plug-and-Play Compatible Register Set
25 General Purpose Input/Output Pins
System Management Interrupt
Multi-Mode™ Parallel Port with ChiProtect™
— Standard Mode IBM PC/XT®, PC/AT®, and PS/2™
Compatible Bi-directional 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
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Keyboard Controller
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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
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AC Power Failure Recovery
Watchdog Timer
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
— Supports One Floppy Drive
— Configurable Open Drain/Push-PullOutput 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 Eight IRQ and Three DMA Options
— Support 3 Mode FDD
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Motherboard GLUE Logic
— IDE Reset Output
— (4) Buffered PCI Reset Outputs with software controlled
reset capability - default transparent
— 3VSB Gate and 3V Gate signal generation
— Front Panel Reset Debouncing and Power Good Signal
Generation
— Power Supply Turn On Circuitry with Support for power
button on PS/2 Keyboard
— Resume Reset Signal Generation
— SMBus Isolation Circuitry (2 sets external and 1 set
internal for Hardware Monitoring Block)
— SMBus 2.0 compliant interface for Hardware Monitoring
— LED Control (2)
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Enhanced Digital Data Separator
— 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbps Data
Rates
— Programmable Precompensation Modes
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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
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Fan Control
5 PWM (Pulse width Modulation) Outputs
Low frequency and high frequency PWM support
6 Fan Tachometer Inputs
Programmable automatic fan control based on
temperature
— Interrupt Pin for out-of-limit Fantach Events
— Fantach events generate PME’s and/or Speaker
warning
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Infrared Port
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Multiprotocol Infrared Interface
IrDA 1.0 Compliant
SHARP ASK IR
480 Addresses, Up to 15 IRQ
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Temperature Monitor
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Monitoring of Two Remote Thermal Diodes
Internal Ambient Temperature Measurement
Limit Comparison of all Monitored Values
Interrupt Pin for out-of-limit Temperature Indication
Thermal events generate PME’s and/or Speaker
warning
— Configurable offset for internal or external temperature
channels.
SMSC DME1737
PRODUCT PREVIEW
Rev. 05-21-04
SMSC [ SMSC CORPORATION ]
