GENERAL DESCRIPTION
The W83627HF and W83627F are evolving product fromWinbond's most popular I/O family. They
feature a whole new interface, namely LPC（Low Pin Count）interface, which will be supported in the next generation Intel chip-set. This interface as its name suggests is to provide an economical implementation of I/O's interface with lower pin countand still maintains equivalent performance as its ISA interface counterpart. Approximately 40 pin counts 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 W83627F/HF's integration of Game Port and MIDI Port.It is fully transparentin terms of software which means no BIOS or device driver update is needed except chip-specific configuration.

FEATURES
General
• Meet LPC Spec. 1.0
•Support LDRQ#（LPC DMA）, SERIRQ （serial IRQ）
• Include all the features of Winbond I/O W83977TF and W83977EF
• Integrate Hardware Monitor functions
• Compliant with Microsoft PC98/PC99 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

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^TM -2,or customer code with 2K bytes of program
mable 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

MIDI Port
• The baud rate is 31.25 Kbaud
• 16-byte input FIFO
• 16-byte output FIFO

General Purpose I/O Ports
• 22 programmable general purpose I/O ports
• General purpose I/O ports can serve as simple I/O ports, interrupt steering inputs, watch dog
timer output, power LED output, infrared I/O pins, KBC control I/O pins, suspend LED output,
RSMRST# signal, PWROK signal, Beep output
• Functional in power down mode （GP1 only） OnNow Functions
• Keyboard Wake-Up by programmable keys
• Mouse Wake-Up by programmable buttons
• CIR Wake-Up by programmable keys
• On Now Wake-Up from all of the ACPI sleeping states （S1-S5）

Hardware Monitor Functions （Only for W83627HF）
• 5 VID input pins for CPU Vcore identification
• 3 thermal inputs from optionally remote thermistors or 2N3904 transistors or Pentium^TM II
（Deschutes）thermal diode output
• 7 positive voltage inputs （typical for +12V, -12V, +5V, -5V, +3.3V, VcoreA, VcoreB）
• 2 intrinsic voltage monitoring （typical for Vbat, +5VSB）
• 3 fan speed monitoring inputs
• 2 fan speed control
• Build in Case open detection circuit
• WATCHDOG comparison of all monitored values
• Programmable hysteresis and setting points for all monitored items
• Over temperature indicate output
• Automatic Power On voltage detection Beep
• Issue SMI#, IRQ, OVT# to activate system protection
•Intel LDCM^TM / Acer ADM^TM compatible

Package
• 128-pin PQFP