DME1737 Super I/O with Temperature Sensing, Quiet Auto Fan and Glue Logic - Modem Control Circuitry Product Features - 480 Address and 15 IRQ Options General Features Infrared Port - 3.3 Volt Operation (SIO Block is 5 Volt Toler- - Multiprotocol Infrared Interface ant) - IrDA 1.0 Compliant - LPC Interface - SHARP ASK IR - Programmable Wake-up Event Interface - 480 Addresses, Up to 15 IRQ - PC99, PC2001 Compliant Multi-Mode Parallel Port with ChiProtect - ACPI 2.0 Compliant - Standard Mode IBM PC/XT, PC/AT, and - Multiplexed Command, Address and Data PS/2 Compatible Bi-directional Parallel Bus Port - Serial IRQ Interface Compatible with Serial- - Enhanced Parallel Port (EPP) Compatible - ized IRQ Support for PCI Systems EPP 1.7 and EPP 1.9 (IEEE 1284 Compliant) - PME Interface - IEEE 1284 Compliant Enhanced Capabilities - ISA Plug-and-Play Compatible Register Set Port (ECP) - 25 General Purpose Input/Output Pins - ChiProtect Circuitry for Protection - System Management Interrupt - 960 Address, Up to 15 IRQ and Three DMA AC Power Failure Recovery Options Watchdog Timer Keyboard Controller 2.88MB Super I/O Floppy Disk Controller - 8042 Software Compatible - Licensed CMOS 765B Floppy Disk Controller - 8 Bit Microcomputer - Software and Register Compatible with - 2k Bytes of Program ROM Microchip s Proprietary 82077AA Compatible - 256 Bytes of Data RAM Core - Four Open Drain Outputs Dedicated for Key- - Supports One Floppy Drive board/Mouse Interface - Configurable Open Drain/Push-PullOutput - Asynchronous Access to Two Data Registers Drivers and One Status Register - Supports Vertical Recording Format - Supports Interrupt and Polling Access - 16-Byte Data FIFO - 8 Bit Counter Timer - 100% IBM Compatibility - Port 92 Support - Detects All Overrun and Underrun Conditions - Fast Gate A20 and KRESET Outputs - Sophisticated Power Control Circuitry (PCC) Motherboard GLUE Logic Including Multiple Powerdown Modes for - IDE Reset Output Reduced Power Consumption - (4) Buffered PCI Reset Outputs with software - DMA Enable Logic controlled reset capability - default transpar- - Data Rate and Drive Control Registers ent - 480 Address, Up to Eight IRQ and Three - 3VSB Gate and 3V Gate signal generation DMA Options - Front Panel Reset Debouncing and Power - Support 3 Mode FDD Good Signal Generation Enhanced Digital Data Separator - Power Supply Turn On Circuitry with Support - 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 for power button on PS/2 Keyboard Kbps Data Rates - Resume Reset Signal Generation - Programmable Precompensation Modes - SMBus Isolation Circuitry (2 sets external Serial Ports and 1 set internal for Hardware Monitoring - Two Full Function Serial Ports Block) - High Speed NS16C550A Compatible UARTs - SMBus 2.0 compliant interface for Hardware with Send/Receive 16-Byte FIFOs Monitoring - Supports 230k and 460k Baud - LED Control (2) - Programmable Baud Rate Generator 2014 Microchip Technology Inc. DS00001794A-page 1DME1737 Fan Control same interrupt event reported on the nHWM INT pin also creates PME wakeup events and speaker alarm - 5 PWM (Pulse Width Modulation) Outputs annunciation. - Low frequency and high frequency PWM support The Motherboard Glue logic includes various power - 6 Fan Tachometer Inputs management and system logic including generation of - Programmable automatic fan control based nRSMRST, SMBus buffers, and buffered PCI reset out- on temperature puts. - Interrupt Pin for out-of-limit Fantach Events The DME1737 incorporates complete legacy Super I/O - Fantach events generate PMEs and/or functionality including an 8042 based keyboard and Speaker warning mouse controller, an IEEE 1284, EPP, and ECP com- Temperature Monitor patible parallel port, one serial port that is 16C550A - Monitoring of Two Remote Thermal Diodes UART compatible, one IrDA 1.0 infrared ports, and a - Internal Ambient Temperature Measurement floppy disk controller with Microchip s true CMOS 765B - Limit Comparison of all Monitored Values core and enhanced digital data separator. The true - Interrupt Pin for out-of-limit Temperature Indi- CMOS 765B core provides 100% compatibility with cation IBM PC/XT and PC/AT architectures and is software - Thermal events generate PMEs and/or and register compatible with Microchip s proprietary Speaker warning 82077AA core. System related functionality, which - Configurable offset for internal or external offers flexibility to the system designer includes, Gen- temperature channels eral Purpose I/O control functions, control of two LED s, Voltage Monitor and fan control using fan tachometer inputs and pulse width modulator (PWM) outputs. - Monitor Power supplies (5V, +5VTR, +12V, Vccp, Vbat, VTR, and VCC) The DME1737 is ACPI 1.0/2.0 compatible and there- - Limit Comparison of all Monitored Values fore supports multiple low power-down modes. It incor- - Interrupt Pin for out-of-limit Voltage Indication porates sophisticated power control circuitry (PCC), - Voltage events generate PMEs and/or which includes support for keyboard and mouse wake- Speaker warning up events. Security Features The DME1737 supports the ISA Plug-and-Play Stan- - Security Key Register (32 byte) for Device dard register set (Version 1.0a). The I/O Address, DMA Authentication Channel and hardware IRQ of each logical device in 6 VID (Voltage Identification) Inputs the DME1737 may be reprogrammed through the inter- nal configuration registers. There are up to 480 (960 - Phoenix Keyboard BIOS ROM Parallel Port) I/O address location options, a Serialized 128-Pin, QFP RoHS Compliant Package IRQ interface, and Three DMA channels. Description The DME1737 is a 3.3V (Super I/O Block is 5V tolerant) PC99/PC2001 compliant Super I/O controller with an LPC interface. DME1737 also includes Hardware Mon- itoring capabilities, enhanced Security features, Power Control logic and Motherboard Glue logic. The DME1737 s hardware monitoring capability includes temperature, voltage and fan speed monitor- ing. It has the ability to alert the system to out-of-limit conditions and automatically control the speeds of mul- tiple fans. There are four analog inputs for monitoring external voltages of +5V, +5VTR, +12V and Vccp (core processor voltage), as well as internal monitoring of the SIO s VCC, VTR, and Vbat power supplies. The DME1737 includes support for monitoring two external temperatures via thermal diode inputs and an internal sensor for measuring ambient temperature. The nHWM INT pin is implemented to indicate out-of-limit temperature, voltage, and FANTACH conditions. The hardware monitoring block of the DME1737 is accessi- ble via the System Management Bus (SMBus). The DS00001794A-page 2 2014 Microchip Technology Inc.