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FDC87W22

Power I/O Controller

SMSC -> Microchip 

- Extension 2FDD Mode Supports Disk

Drives A And B Through Parallel Port

- JOYSTICK Mode Supports Joystick

Through Parallel Port

• Programmable Configuration Settings

• Immediate or Automatic Power-Down Mode

for Power Management

• ISA Host Interface

• All Hardware Power-On Settings Have

Internal Pull-Up or Pull-Down Resistors as

Default Value

• Configurable Plug and Play Registers

• Infrared Communication Port

• 100 Pin QFP Package

GENERAL DESCRIPTION

The FDC87W22 integrates a disk drive adapter,

serial port (UART), parallel port, IDE bus

interface, and game port decoder onto a single

chip. The FDC87W22 also has additional

powerful features such as configurable plug-

and-play registers for the whole chip and

infrared support in one of the serial ports.

The disk drive adapter functions of the

FDC87W22 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 into the

FDC87W22 greatly reduces the number of

components required for interfacing with floppy

disk drives. The FDC87W22 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, and 1 Mb/S.

The FDC87W22 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.

The FDC87W22 supports one PC-compatible

printer port. Additional bidirectional I/O

capability is available by hardware control or

software programming. The parallel port also

supports the Enhanced Parallel Port (EPP) and

Extended Capabilities Port (ECP). The

FDC87W22 supports two embedded hard disk

drive (AT bus) interfaces and a game port with

decoded read/write output. The chip's Extension

FDD Mode and Extension 2FDD Mode allow one

or two external floppy disk drives to be

connected to the computer through the printer

interface pins in notebook computer

applications.

The Extension Adapter Mode of the FDC87W22

allows pocket devices to be installed through the

printer interface pins in notebook computer

applications according to a protocol set by

SMSC, but with upgraded performance. The

JOYSTICK mode allows a joystick to be

connected to a parallel port with a signal

switching cable. The configuration registers

support mode selection, function enable/disable,

and power down function selection. Moreover,

the configurable PnP registers are compatible

with the plug-and-play feature in Windows 95TM,

which makes system resource allocation more

efficient than ever.

Standard Microsystems is a registered trademark and

SMSC is a trademark of Standard Microsystems

Corporation. Other product and company names are

trademarks or registered trademarks of their respective

holders.

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