W83877 Winbond Electronics Corp America, W83877 Datasheet - Page 2

• Manufacturer Part Number: W83877
• Description: Winbond I/O
• Manufacturer: Winbond Electronics Corp America

FEATURES
FDC:
UART:
Parallel Port:
Compatible with IBM PC AT disk drive systems
Variable write pre-compensation with track selectable capability
DMA enable logic
Non-burst mode DMA option
Supports floppy disk drives and tape drives
Detects all overrun and underrun conditions
Data rate and drive control registers
Built-in address mark detection circuit to simplify the read electronics
IBM PC system address decoder
Supports up to two embedded hard disk drives (IDE AT BUS)
Single 24 MHz crystal input
FDD anti-virus functions with software write protect and FDD write enable signal, write data signal
force 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 bps data transfer rate
Supports vertical recording format
16-byte data FIFOs
Two high-speed 16550 compatible UARTs with 16-byte send/receive FIFOs
MIDI compatible
Fully programmable serial-interface characteristics:
Internal diagnostic capabilities:
Programmable baud generator allows division of 1.8461 MHz and 24 MHz by 1 to (2
5, 6, 7 or 8-bit characters
Even, odd or no parity bit generation/detection
1, 1.5 or 2 stop bits generation
Loop-back controls for communications link fault isolation
Break, parity, overrun, framing error simulation
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