Description

The W83627SF is the new generation of Winbond's LPC I/O products. It features a whole new interface, namely LPC (Low Pin Count) interface, which is supported in mainstream Intel chip-set. This interface as its name suggests is to provide an economical implementation of I/O's interface with lower pin count and still maintains equivalent performance as its ISA interface counterpart. Approximately 40 pins are saved in LPC I/O comparing to ISA implementation. With this additional freedom, we can implement more devices on a single chip as demonstrated in W83627SF's integration of Game Port and MIDI Port. It is fully transparent in terms of software which means no BIOS or device driver update is needed except chip-specific configuration.

Specifications and features

General
• Meet LPC Spec. 1.01
• Support LDRQ#(LPC DMA), SERIRQ (serial IRQ)
• Compliant with Microsoft PC2000/PC2001 Hardware Design Guide
• Support DPM (Device Power Management), ACPI
• Programmable configuration settings
• Single 24 or 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 Win95/98 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 Consumer IR

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 AMIKKEY
-2, Phoenix MultiKey/42 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
• 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
• 6 MHz, 8 MHz, 12 MHz, or 16 MHz operating frequency

Game Port
• Support two separate Joysticks
• Support every Joystick two axis (X,Y) and two button (A,B) controllers

Application Scenarios

The W83627SF electronic component model can be used in various scenarios such as:

• Personal computer motherboards
• Embedded systems
• Industrial automation
• Gaming consoles

Comparison

The advantages of the W83627SF electronic component model:

• Economical implementation of I/O's interface with lower pin count
• Transparent in terms of software, no BIOS or device driver update is needed except chip-specific configuration
• Integration of Game Port and MIDI Port

The disadvantages of the W83627SF electronic component model:

• Requires LPC interface support
• May not be compatible with older chip-set designs
• May require additional configuration for specific applications