W83977G Winbond Electronics Corp America, W83977G Datasheet - Page 9

• Manufacturer Part Number: W83977G
• Description: W83877TF plus KBC, CIR, RTC, Pb-free
• Manufacturer: Winbond Electronics Corp America

W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
1. GENERAL DESCRIPTION
This data sheet covers two products: W83977F/G, and W83977AF/AG whose pin assignment, and
most of the functions are the same. W83977AF/AG is an advanced version of W83977F/G featuring
the FIR function.
W83977F/G, W83977AF/AG are evolving products 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/AG provides the functions of IrDA 1.1 (MIR for 1.152M bps or FIR
for 4M bps).
The disk drive adapter functions of W83977F/G, W83977AF/AG 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/G, W83977AF/AG greatly reduces the
number of components required for interfacing with floppy disk drives. The W83977F/G,
W83977AF/AG 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/G, W83977AF/AG provide 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/AG alone
provides independent 3rd UART (32-byte FIFO) dedicated for IR function.
The W83977F/G, W83977AF/AG 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
TM
demand of Windows 95
, which makes system resource allocation more efficient than ever.
W83977F/G, W83977AF/AG 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/G, W83977AF/AG also has auto power management to reduce power
consumption.
The keyboard controller is based on 8042 compatible instruction set with a 2K Byte programmable
TM
ROM and a 256-Byte RAM bank. Keyboard BIOS firmware is available with optional AMIKEY
2,
-
TM
Phoenix MultiKey/42
, or customer code.
The W83977F/G, W83977AF/AG 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.
TM
W83977F/G, W83977AF/AG 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. Full
16-bit address decoding is also provided. Moreover W83977F/G, W83977AF/AG is made to meet the
specification of PC97‘s requirement in the power management: ACPI and DPM (Device Power
Management).
Publication Release Date: May 2006
-1 -
Revision 0.60