Features: General
· Plug & Play 1.0A compatible
· Support 13 IRQs, 4 DMA channels, full 16-bit address decoding
· Capable of ISA Bus IRQ Sharing
· Compliant with Microsoft PC97 Hardware Design Guide
• Support DPM (Device Power Management), ACPI
· Report ACPI status interrupt by SCI signal issued from any of the 13 IQRs pins or GPIO xx
· Programmable configuration settings
· Single 24/48 Mhz clock input
FDC
· Compatible with IBM PC AT disk drive systems
· Variable write pre-compensation with track selectable capability
· Support vertical recording format
· DMA enable logic
· 16-byte data FIFOs
· Support 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)
· Support 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
• Support 3-mode FDD, and its Win95 driver
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 up to 921k bps for 14.769 Mhz and 1.5M bps for 24 Mhz
Infrared
· Support IrDA version 1.0 SIR protocol with maximum baud rate up to 115.2K bps
· Support SHARP ASK-IR protocol with maximum baud rate up to 57,600 bps
· Support IrDA version 1.1 MIR (1.152M bps) and FIR (4M bps) protocol
--- Single DMA channel for transmitter or receiver
--- 3rd UART with 32-byte FIFO is supported in both TX/RX transmission
--- 8-byte status FIFO is supported to store received frame status (such as overrun CRC error,
etc.)
· Support auto-config SIR and FIR
Parallel Port
· Compatible with IBM parallel port
· Support PS/2 compatible bi-directional parallel port
· Support Enhanced Parallel Port (EPP) - Compatible with IEEE 1284 specification
· Support 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
Keyboard Controller
· 8042 based with optional F/W from AMIKKEYTM-2, Phoenix MultiKey/42TM or customer code
with 2K bytes of programmable ROM, and 256 bytes of RAM
· Asynchronous Access to Two Data Registers and One status Register
• Software compatibility with the 8042 and PC87911 microcontrollers
· Support PS/2 mouse
· Support port 92
· Support both interrupt and polling modes
• Fast Gate A20 and Hardware Keyboard Reset
· 8 Bit Timer/ Counter
· Support binary and BCD arithmetic
· 6MHz, 8 MHz, 12 MHz, or 16 MHz operating frequency
General Purpose I/O Ports
· 23 programmable general purpose I/O ports; 1 dedicate, 22 optional
· General purpose I/O ports can serve as simple I/O ports, interrupt steering inputs, watching dog
timer output, power LED output, infrared I/O pins, general purpose address decoder, KBC control
I/O pins
OnNow Funtions
· Keyboard wake-up by programmable keys (patent pending)
· Mouse wake-up by programmable buttons (patent pending)
· CIR wake-up by programmable keys (patent pending)
Package
· 128-pin PQFPPinout
Specifications
| PARAMETER |
RATING |
UNIT |
| Power Supply Voltage |
-0.5 to 7.0 |
V |
| Input Voltage |
-0.5 to VDD+0.5 |
V |
| RTC Battery Voltage VBAT |
4.0 to 1.8 |
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 W83977ATF is an evolving product 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, 8042 keyboard controller with PS/2 mouse support, 23 general purpose I/O ports, full 16-bit address decoding, OnNow keyboard wake-up, OnNow mouse wake-up, and OnNow CIR wake-up. In addition, the W83977ATF provides IR functions: IrDA 1.1 (MIR for 1.152M bps or FIR for 4M bps) and TV remote IR (Consumer IR, supporting NEC, RC-5, extended RC-5, and RECS-80 protocols).
The disk drive adapter functions of W83977ATF 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 the W83977ATF greatly reduces the number of components required for interfacing with floppy disk drives. The W83977ATF 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 W83977ATF 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 also advanced speed with baud rates of 230k, 460k, or 921k bps which support higher speed modems. The W83977ATF provides independent 3rd UART(32-byte FIFO) dedicated for the IR function.
The W83977ATF 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 95TM, which makes system resource allocation more efficient than ever.
The W83977ATF 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. The W83977ATF 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 AMIKEYTM -2, Phoenix MultiKey/42TM, or customer code.
The W83977ATF 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 predefined alternate function.
The W83977ATF 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, W83977ATF is made to meet the specification of PC97's requirement in the power management: ACPI and DPM (Device Power Management).
Another benifit is that W83977ATF has the same pin assignment as W83977AF, W83977F, W83977TF. This makes the design very flexible.
W83977ATF Data Sheet
