W83877TD Просмотр технического описания (PDF) - Winbond

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W83877TD

WINBOND I/O

Winbond 

W83877TF/W83877TG

1. GENERAL DESCRIPTION

W83877TF/TG 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: ACPI / legacy power

management, serial IRQ, and IRQ sharing.

The disk drive adapter functions of W83877TF/TG include a floppy disk 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, interrupt and DMA logic. The wide range of

functions integrated into W83877TF/TG greatly reduces the number of components required for

interfacing with floppy disk drives. W83877TF/TG 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.

W83877TF/TG 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 support infrared (IR) IrDA1.0. Both UARTs provide legacy speed with baud rate up to

115.2K and provide advanced speed with baud rate up to 230k, 460k, and 921k bps which support

higher speed Modems.

W83877TF/TG 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. This function is especially valuable for notebook

computer applications.

Winbond W83877TF/TG 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. One 24-bits power management timer is implemented with the carry notify interrupt.

W83877TF/TG also has auto power management mode to reduce the power consumption.

The serial IRQ for PCI architecture is supported, ISA IRQs (IRQ1~IRQ15) can be cascaded into one

IRQSER pin. W83877TF/TG also features ISA bus IRQ sharing and allows two or more devices to

share the same IRQ pin.

W83877TF/TG is made to fully comply with MicrosoftTM PC97 Hardware Design Guide. IRQs,

DMAs, and I/O space resources are flexible to adjust to meet ISA PnP requirement. Moreover

W83877TF/TG 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 registers are compatible with the Plug-and-Play feature

demand of Windows 95TM , which makes system resource allocation more efficient than ever.

Another benefit of W83877TF/TG is that it is pin-to-pin compatible to W83877F, and all of the 100-pin

Winbond I/O IC family. Thus makes the design of applications very convenient and flexible.

Publication Release Date: May 2006

-1-

Revision 0.7

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