W83977A Winbond Electronics Corp America, W83977A Datasheet - Page 9

• Manufacturer Part Number: W83977A
• Description: Winbond I/O
• Manufacturer: Winbond Electronics Corp America

GENERAL DESCRIPTION
The W83977TF is an
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, 8042 keyboard controller
with PS/2 mouse support,
wake-up, OnNow mouse wake-up.
The disk drive adapter functions of W83977TF 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 and DMA logic. The wide range of
functions integrated into the W83977TF greatly reduces the number of components required for
interfacing with floppy disk drives. The W83977TF supports 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 W83977TF 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 up to 115.2k bps and
of
The W83977TF 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
W83977TF 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.
W83977TF 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
MultiKey/42
The W83977TF provides a set of flexible I/O control functions to the system designer through a set of
General Purpose I/O ports.
configured to provide a predefined alternate function.
W83977TF is made to fully comply with Microsoft PC97 Hardware Design Guide. IRQs, DMAs, and
I/O space resource are flexible to adjust to meet ISA PnP requirement. Moreover W83977TF is made to
meet the specification of PC97's requirement in the power management: ACPI and DPM (Device
Power Management).
Another benifit
This makes the design very flexible.
230k, 460k, or 921k bps which support higher speed modems.
TM
, or customer code.
is that W83977TF has the same pin assignment as W83977AF, W83977F, W83977ATF.
evolving product
TM
, which makes system resource allocation more efficient than ever.
23
general purpose I/O ports, full 16-bit address decoding,
These GPIO ports may serve as simple I/O or may be individually
from Winbond's most popular I/O chip W83877F --- which
-1-
also
Publication Release Date: April 1998
advanced speed with
WINBOND I/O
Preliminary Revision 0.62
W83977TF
OnNow keyboard
TM
-
baud rates
2, Phoenix