W83877ATG Nuvoton Technology Corporation of America, W83877ATG Datasheet - Page 8

• Manufacturer Part Number: W83877ATG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83877ATG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

W83877ATF/W83877ATG
1. GENERAL DESCRIPTION
W83877ATF/ATG is an enhanced version 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 for the whole chip --- plus additional powerful features: IrDA 1.1 (MIR for 1.152M
bps or FIR for 4M bps), TV remote IR, ACPI, serial IRQ, full 16-bit address decoding, and ACPI
compliant.
The disk drive adapter functions of W83877ATF/ATG 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 onto W83877ATF/ATG greatly reduces the number of components
required for interfacing with floppy disk drives. W83877ATF/ATG 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.
W83877ATF/ATG 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. One of the UARTs supporting infrared (IR) includes 32-byte FIFO, serial IR, 1.152M bps MIR,
0.576M bps, 4M bps FIR, and TV remote IR (supporting NEC, RC-5, extended RC-5, and RECS-80
protocols). 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.
W83877ATF/ATG 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 to the notebook computer.
Winbond W83877ATF/ATG provides functions that comply with ACPI (Advanced Configuration and
or
Power Interface), which includes support of legacy and ACPI power management through SMI
SCI function pins. One 24-bit power management timer is implemented with carry notify interrupt.
W83877ATF/ATG also has auto power management to reduce power consumption.
The Serial IRQ for PCI architecture is supported, ISA IRQs (IRQ1~IRQ15) can be cascaded into one
IRQ pin. W83877ATF/ATG also features ISA bus IRQ sharing and allows two or more devices to
share the same IRQ.
TM
W83877ATF/ATG 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 requirements. Moreover,
W83877ATF/ATG is made to meet the specification of PC97's requirement in the power management:
ACPI and DPM (Device Power Management).
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.
Another benifit is that W83877ATF/ATG has the same pin assignment as W83877F, W83877AF,
W83877TF. This makes the design very flexible.
Publication Release Date:November 2006
- 1 -
Version 1.0