GENERAL DESCRIPTION W83877TF/TG is an enhanced version from Winbonds most popular I/O chip W83877F --- which integrates the disk drive adapter, serial port (UART), IrDA 1.0 SIR, parallel port, configurable Plug-and-Play registers for the whole chip --- plus additional powerful features: ACPI / legacy power management, serial IRQ, and IRQ sharing. FEATURES General: • Plug & Play 1.0A Compliant • Support 8 IRQs (ISA), or 15 IRQs (Serial IRQ), 3 DMA channels, and 480 re-locatable address • Capable of ISA Bus IRQ Sharing • Comply with Microsoft PC 97 Hardware Design Guide • Support DPM (Device Power Management), ACPI • Report ACPI status interrupt by SCI signal from SCI pin, serial IRQ IRQSER pin, or IRQ A~H pins • Single 24MHz/48MHZ clock input FDC: • Compatible with IBM PC AT disk drive systems • Variable write pre-compensation with track selectable capability • DMA enable logic • 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 signalwas 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 vertical recording format • Support 3-mode FDD, and its Win95 driver • 16-byte data FIFOs 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 is up to 921k bps for 14.768MHz and 1.5M bps for 24MHz Infrared: • Supports IrDA version 1.0 SIR protocol with maximum baud rate up to 115.2K bps • Supports SHARP ASK-IR protocol with maximum baud rate up to 57600 bps Parallel Port: • Compatible with IBM parallel port • Supports PS/2 compatible bi-directional parallel port • Supports Enhanced Parallel Port (EPP) − Compatible with IEEE 1284 specification • Supports 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 Others: • Programmable configuration settings • Immediate or automatic power-down mode for the power management • All hardware power-on settings have internal pull-up or pull-down resistors as default value • Dedicated Infrared Communication Pins Package: • 100-pin QFP (W83877TF/TG), and also 100-pin LQFP (W83877TD/TG)
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