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FDC87W21

Power I/O Controller with Fast Infrared Support

SMSC -> Microchip 

- 8-Byte Status FIFO Is Supported

to Store Received Frame Status

(Such as Overrun, CRC Error,

Etc.)

- Supports Auto-Config SIR and FIR

• Parallel Port

- Compatible with IBM Parallel Port

- Supports Parallel Port with Bi-

Directional 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; and Extension 2FDD Mode

Supports Disk Drives A and B Through

Parallel Port

- Extension Adapter Mode Supports

Pocket Devices Through Parallel Port

- JOYSTICK Mode Supports Joystick

Through Parallel Port

• ISA Host Interface

• IDE

- Supports up to Two Embedded Hard

Disk Drives (IDE AT BUS)

• Programmable Configuration Settings

• Immediate or Automatic Power-Down Mode

for Power Management

• All Hardware Power-On Settings Have

Internal Pull-Up or Pull-Down Resistors as

Default Value

• 100 Pin QFP Package

GENERAL DESCRIPTION

The FDC87W21 is an enhanced version of the

FDC87W22 --- which integrates the disk drive

adapter, serial port (UART), IrDA 1.0 SIR,

parallel port, IDE interface, configurable plug-

and-play registers for the whole chip --- adding

powerful features: IrDA 1.1 (MIR for 1.152 Mbps

or FIR for 4 Mbps), TV remote IR. In addition to

the function enhancement, FDC87W21 is pin-to-

pin compatible to FDC87W22.

The disk drive adapter functions of the

FDC87W21 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, interrupt and DMA logic. The wide range

of functions integrated into the FDC87W21

greatly reduces the number of components

required for interfacing with floppy disk drives.

The FDC87W21 supports up to 4 Three-mode

Floppy Disk Drives (FDD) of formats 360K,

720K, 1.2M, 1.44M, or 2.88M, and data transfer

rates of 250 Kbps, 300 Kbps, 500 Kbps, 1

Mbps, and 2 Mbps.

The FDC87W21 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. One of UART supports infrared

(IR) includes 32-byte FIFO, serial IR (115, 200

bps), MIR (1.152 Mbps or 0.576 Mbps), FIR (4

Mbps), and TV remote IR (supported NEC, RC-

5, extended RC-5, and RECS-80 protocols).

The FDC87W21 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 attached.

Especially in the application of notebook

computer, this feature is very useful.

The Extension Adapter Mode of the FDC87W21

also 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.

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