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)