GENERAL DESCRIPTION
The FDC37C93xFR with Fast IR support incorporates a keyboard interface, real-time clock, SMSC's true CMOS 765B floppy disk controller, advanced digital data separator, 16 byte data FIFO, two 16C550 compatible UARTs, one Multi-Mode parallel port which includes ChiProtect circuitry plus EPP and ECP support, IDE interface, on-chip 24 mA AT bus drivers, game port chip select and two floppy direct drive support, as well as ACCESS.bus, soft power management and SMI support. The true CMOS 765B core provides 100% compatibility with IBM PC/XT and PC/AT architectures in addition to providing data overflow and underflow protection. The SMSC advanced digital data
separator incorporates SMSC's patented data separator technology, allowing for ease of testing and use. Both on-chip UARTs are compatible with the NS16C550. The parallel port, the IDE interface, and the game port select logic are compatible with IBM PC/AT architecture, as well as EPP and ECP.

FEATURES
·  5 Volt Operation
·  ISA Plug-and-Play Standard (Version 1.0a)
Compatible Register Set
·  Soft Power Management, SMI Support
·  ACCESS.bus Support
·  8042 Keyboard Controller
- 2K Program ROM
- 256 Bytes Data RAM
- Asynchronous Access to Two Data
Registers and One Status Register
- Supports Interrupt and Polling Access
- 8 Bit Timer/Counter
- Port 92 Support
- Fast Gate A20 and Hardware Keyboard Reset
·  Real Time Clock
- MC146818 and DS1287 Compatible
- 256 Bytes of Battery Backed CMOS in Two Banks of 128 Bytes
- 128 Bytes of CMOS RAM Lockable in 4x32 Byte Blocks
- 12 and 24 Hour Time Format
- Binary and BCD Format
- 1mA Standby Current (typ)
·  Intelligent Auto Power Management
·  2.88MB Super I/O Floppy Disk Controller
- Relocatable to 480 Different Addresses
- 13 IRQ Options
- Four DMA Options
- Licensed CMOS 765B Floppy Disk Controller
- Advanced Digital Data Separator
- Software and Register Compatible with SMSC's Proprietary 82077AA
Compatible Core
- Sophisticated Power Control Circuitry (PCC) Including Multiple Powerdown
Modes for Reduced Power Consumption
- Game Port Select Logic
- Supports Two Floppy Drives Directly
- 24mA AT Bus Drivers
- Low Power CMOS Design
·  Licensed CMOS 765B Floppy Disk Controller Core
- Supports Vertical Recording Format
- 16 Byte Data FIFO
- 100% IBM® Compatibility
- Detects All Overrun and Underrun Conditions
- 48mA Drivers and Schmitt Trigger Inputs
- DMA Enable Logic
- Data Rate and Drive Control Registers
·  Enhanced Digital Data Separator
- Low Cost Implementation
- No Filter Components Required
- 2 Mbps, 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbps Data Rates
- Programmable Precompensation Modes
·  Serial Ports
- Relocatable to 480 Different Addresses
- 13 IRQ Options
- Two High Speed NS16C550 Compatible UARTs with Send/Receive 16 Byte FIFOs