Features: General:
· Plug & Play 1.0A Compliant
· Support 8 IRQs (ISA), or 15 IRQs (Serial IRQ), 3 DMA channels, and 480 re-locatable address
· Capable of ISA Bus IRQ Sharing
· Comply with Microsoft PC 97 Hardware Design Guide
· Support DPM (Device Power Management), ACPI
· Report ACPI status interrupt by SCI signal from SCI pin, serial IRQ IRQSER pin, or IRQ A~H pins
· Single 24MHz/48MHZ clock input
FDC:
· Compatible with IBM PC AT disk drive systems
· Variable write pre-compensation with track selectable capability
· DMA enable logic
· Supports floppy disk drives and tape drives
· Detects all overrun and underrun conditions
· Built-in address mark detection circuit to simplify the read electronics
· FDD anti-virus functions with software write protect and FDD write enable signal (write data signal
was forced to be inactive)
· Supports up to four 3.5-inch or 5.25-inch floppy disk drives
· Completely compatible with industry standard 82077
· 360K/720K/1.2M/1.44M/2.88M format;250K, 300K, 500K, 1M, 2M bps data transfer rate
· Supports vertical recording format
• Support 3-mode FDD, and its Win95 driver
· 16-byte data FIFOs
UART:
· Two high-speed 16550 compatible UARTs with 16-byte send/receive FIFOs
· MIDI compatible
· Fully programmable serial-interface characteristics:
- 5, 6, 7 or 8-bit characters
- Even, odd or no parity bit generation/detection
- 1, 1.5 or 2 stop bits generation
· Internal diagnostic capabilities:
- Loop-back controls for communications link fault isolation
- Break, parity, overrun, framing error simulation
· Programmable baud generator allows division of 1.8461 MHz and 24 MHz by 1 to (216-1)
· Maximum baud rate is up to 921k bps for 14.768MHz and 1.5M bps for 24MHz
Infrared:
· Supports IrDA version 1.0 SIR protocol with maximum baud rate up to 115.2K bps
· Supports SHARP ASK-IR protocol with maximum baud rate up to 57600 bps
Parallel Port:
· Compatible with IBM parallel port
· Supports PS/2 compatible bi-directional parallel port
· Supports Enhanced Parallel Port (EPP) - Compatible with IEEE 1284 specification
· Supports Extended Capabilities Port (ECP) - Compatible with IEEE 1284 specification
· Extension FDD mode supports disk drive B; and Extension 2FDD mode supports disk drives A and
B through parallel port
· Enhanced printer port back-drive current protection
Others:
· Programmable configuration settings
· Immediate or automatic power-down mode for the power management
· All hardware power-on settings have internal pull-up or pull-down resistors as default value
· Dedicated Infrared Communication Pins
Package:
· 100-pin QFP (W83877TF), and also 100-pin LQFP (W83877TD)Pinout
Specifications
| PARAMETER |
RATING |
UNIT |
| Power Supply Voltage |
-0.3 to 7.0 |
V |
| Input Voltage |
-0.5 to VDD+0.5 |
V |
| Operating Temperature |
0 to + 70 |
°C |
| Storage Temperature |
-55 to + 150 |
°C |
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.DescriptionThe W83877TF 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 Plugand- 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 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 the W83877TF greatly reduces the number of components required for interfacing with floppy disk drives. The W83877TF 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 W83877TF 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.
The W83877TF 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 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 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 also features ISA bus IRQ sharing and allows two or more devices to share the same IRQ pin.
W83877TF 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 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 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.
W83877TF Data Sheet
