W83977F Datasheet, PDF (12/181 Pages) Winbond – PLUG & PLAY 1.0A COMPLIANT

W83977F/ W83977AF
PRELIMINARY
GENERAL DESCRIPTION
This data sheet covers two products: W83977F, and W83977AF whose pin assignment, and most of
the functions are the same. W83977AF is an advanced version of W83977F featuring the FIR
function.
W83977F/ AF is an evolving product from Winbond’s 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 in one chip --- plus additional powerful features: ACPI, 8042 keyboard controller
with PS/2 mouse support, Real Time Clock, 14 general purpose I/O ports, full 16-bit address
decoding, TV remote IR (Consumer IR, supporting NEC, RC-5, extended RC-5, and RECS-80
protocols). In addition, W83977AF provides the functions of IrDA 1.1 (MIR for 1.152M bps or FIR for
4M bps).
The disk drive adapter functions of W83977F/ AF include a floppy disk drive controller compatible
with the industry standard 82077/ 765, data separator, write pre-compensation circuit, decode logic,
data rate selection, clock generator, drive interface control logic, and interrupt/ DMA logic. The wide
range of functions integrated onto the W83977F/ AF greatly reduces the number of components
required for interfacing with floppy disk drives. The W83977F/ AF supports up to four 360K, 720K,
1.2M, 1.44M, or 2.88M disk drives and data transfer rates of 250 Kb/s, 300 Kb/s, 500 Kb/s,1 Mb/s,
and 2 Mb/s.
The W83977F/ AF provides two high-speed serial communication ports (UARTs), one of which
supports serial Infrared communication. Each UART includes a 16-byte send/receive FIFO, a
programmable baud rate generator, complete modem control capability, and a processor interrupt
system. Both UARTs provide legacy speed with baud rate 115.2k and provide advanced speed with
baud rate 230k, 460k, and 921k bps which support higher speed modems. W83977AF alone
provides independent 3rd UART (32-byte FIFO) dedicated for IR function.
The W83977F/ AF supports one PC-compatible printer port (SPP), Bi-directional Printer port (BPP)
and also Enhanced Parallel Port (EPP) and Extended Capabilities Port (ECP). Through the printer
port interface pins, also available are: Extension FDD Mode and Extension 2FDD Mode allowing one
or two external floppy disk drives to be connected.
The configuration registers support mode selection, function enable/disable, and power down function
selection. Furthermore, the configurable PnP features are compatible with the plug-and-play feature
demand of Windows 95^TM, which makes system resource allocation more efficient than ever.
W83977F/ AF provides functions that comply with ACPI (Advanced Configuration and Power
Interface), which includes support of legacy and ACPI power management through SMI or SCI
function pins. W83977F/ AF also has auto power management to reduce power consumption.
The keyboard controller is based on 8042 compatible instruction set with a 2K Byte programmable
ROM and a 256-Byte RAM bank. Keyboard BIOS firmware is available with optional AMIKEY^TM -2,
Phoenix MultiKey/42^TM, or customer code.
The W83977F/ AF provides a set of flexible I/O control functions to the system designer through a set
of General Purpose I/O ports. These GPIO ports may serve as simple I/O or may be individually
configured to provide a pre-defined alternate function.
W83977F/ AF is made to fully comply with Microsoft^TM PC97 Hardware Design Guide. IRQs,
DMAs, and I/O space resource are flexible to adjust to meet ISA PnP requirement. Full 16-bit
address decoding is also provided. Moreover W83977F/ AF is made to meet the specification of
PC97‘s requirement in the power management: ACPI and DPM (Device Power Management).
Publication Release Date: March 1998
-1-
Revision 0.58