GENERAL DESCRIPTION
The W83697SF is evolving product from Winbond's most popular I/O family. They feature a whole new interface, namely LPC (Low Pin Count) interface, which will be supported in the new generation chip set. This interface as its name suggests is to provide an economical implementation of I/O's interface with lower pin count and still maintains equivalent performance as its ISA interface counterpart. Approximately 40 pin counts are saved in LPC I/O comparing to ISA implementation.

FEATURES
General
· Meet LPC Spec. 1.1
· Support LDRQ#(LPC DMA), SERIRQ (serial IRQ)
· Include all the features of Winbond I/O W83877TF
· Integrate Smart Card functions
· Compliant with Microsoft PC98/PC99 Hardware Design Guide
· Support DPM (Device Power Management), ACPI
· Programmable configuration settings
· Single 24 or 48 MHz clock input
FDC
· Compatible with IBM PC AT disk drive systems
· Variable write pre-compensation with track selectable capability
· Support vertical recording format
· DMA enable logic
· 16-byte data FIFOs
· Support floppy disk drives and tape drives
· Detects all overrun and underrun conditions
· Built-in address mark detection circuit to simplify the read electronics
· FDD anti-virus functions with software write protect and FDD write enable signal (write data signal was forced to be inactive)
· Support up to four 3.5-inch or 5.25-inch floppy disk drives
· Completely compatible with industry standard 82077
· 360K/720K/1.2M/1.44M/2.88M format; 250K, 300K, 500K, 1M, 2M bps data transfer rate
· Support 3-mode FDD, and its Win95/98 driver
UART
· Two high-speed 16550 compatible UARTs with 16-byte send/receive FIFOs
· MIDI compatible
· Fully programmable serial-interface characteristics:
   --- 5, 6, 7 or 8-bit characters
   --- Even, odd or no parity bit generation/detection
   --- 1, 1.5 or 2 stop bits generation
· Internal diagnostic capabilities:
   --- Loop-back controls for communications link fault isolation
   --- Break, parity, overrun, framing error simulation
· Programmable baud generator allows division of 1.8461 MHz and 24 MHz by 1 to (216-1)
· Maximum baud rate up to 921k bps for 14.769 MHz and 1.5M bps for 24 MHz
Infrared
· Support IrDA version 1.0 SIR protocol with maximum baud rate up to 115.2K bps
· Support SHARP ASK-IR protocol with maximum baud rate up to 57,600 bps
· Support Consumer IR with Wake-Up function.
Parallel Port
· Compatible with IBM parallel port
· Support PS/2 compatible bi-directional parallel port
· Support Enhanced Parallel Port (EPP) - Compatible with IEEE 1284 specification
· Support Extended Capabilities Port (ECP) - Compatible with IEEE 1284 specification
· Extension FDD mode supports disk drive B; and Extension 2FDD mode supports disk drives A and B through parallel port
· Enhanced printer port back-drive current protection