GENERAL DESCRIPTION
The W83697HF 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. 1.01
• Support LDRQ#(LPC DMA), SERIRQ (serial IRQ)
• Include all the features of Winbond I/O W83877TF
• Integrate Hardware Monitor 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 under run 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
Game Port
• Support two separate Joysticks
• Support every Joystick two axes (X, Y) and two buttons (S1,S2) controllers
MIDI Port
• The baud rate is 31.25 K baud rate
• 16-byte input FIFO
• 16-byte output FIFO
Flash ROM Interface
• Support up to 4M flash ROM
General Purpose I/O Ports
• 48 programmable general purpose I/O ports
• General purpose I/O ports can serve as simple I/O ports, watch dog timer output, power LED output, infrared I/O pins, suspend LED output, Beep output
• Functional in power down mode