
W83977EF/ CTF
PRELIMINARY
Publication Release Date: March 1999
-2 -
Revision A1
FEATURES
General
Plug & Play 1.0A compatible
Supports 12 IRQs, 4 DMA channels, full 16-bit address decoding
Capable of ISA Bus IRQ Sharing
Compliant with
Microsoft PC98
Hardware Design Guide
Supports
DPM
(Device Power Management),
ACPI
Reports ACPI status interrupt by SCI#
signal issued from any of the 12 IQRs pins or GPIO xx
Programmable configuration settings
Single 24/48 Mhz clock input
FDC
Compatible with IBM PC AT disk drive systems
Variable write pre-compensation with track selectable capability
Supports vertical recording format
DMA enable logic
16-byte data FIFOs
Supports 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 is
forced to be inactive)
Supports 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
Supports
3-mode FDD, and its Win95 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