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FDC87W22

Power I/O Controller

SMSC -> Microchip 

FDC87W22

Power I/O Controller

FEATURES

• 5 Volt Operation

• Floppy Disk Controller (FDC)

- Compatible with IBM PC/AT Disk Drive

Systems

- Variable Write Pre-Compensation with

Track Selectable Capability

- DMA Enable Logic

- Non-Burst Mode DMA Option

- Supports Floppy Disk Drives and Tape

Drives

- Detects All Overrun and Underrun

Conditions

- Data Rate and Drive Control Registers

- Built-in Address Mark Detection Circuit to

Simplify the Read Electronics

- IBM PC System Address Decoder

- Supports up to Two Embedded Hard

Disk Drives (IDE AT BUS)

- Single 24 MHz Crystal Input

- FDD Anti-Virus Functions With Software

Write Protect and FDD Write Enable

Signal, Write Data Signal Force Inactive

- Supports up to Four 3.5-Inch or 5.25-

Inch Floppy Disk Drives

- Completely Compatible with Industry

Standard 82077

- 360Kbps/720K/1.2M/1.44M/2.88M

Format

- 250Kbps, 300Kbps, 500Kbps, 1 Mbps

Data Transfer Rate

- Supports Vertical Recording Format

- 16-Byte Data FIFOs

• Serial Ports

- 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)

• Parallel Port

- Compatible with IBM Parallel Port

- Supports Parallel Port with Bidirectional

Lines

- 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 Through Parallel Port

- Extension Adapter Mode Supports

Pocket Devices Through Parallel Port

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