GENERAL DESCRIPTION
The W83697HF is evolving product from Winbond's mostpopular 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 isto 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. With this additional freedom, we can implement more devices on a single chip as demonstrated in W83697HF's integration of Game Port and MIDI Port. It is fully transparent in terms of software which means no BIOS or device driver update is needed except chip-specific configuration.

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