•
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
2
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.
SMSC [ SMSC CORPORATION ]
