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PDF W83787IF Data sheet ( Hoja de datos )
| Número de pieza | W83787IF | |
| Descripción | I/O WITH SERIAL-INFRARED SUPPORT | |
| Fabricantes | Winbond | |
| Logotipo |  |
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W83787IF
WINBOND I/O WITH SERIAL-INFRARED SUPPORT
PRELIMINARY
GENERAL DESCRIPTION
The W83787IF is a derivative product of W83787F with one of UARTs support HPSIR and ASKIR.
The W83787IF integrates a disk drive adapter ,two 16550 compatible UARTs, and one parallel port
with EPP mode, ECP mode, and joystick mode.
The disk drive adapter functions of the W83787IF is sames as W83787F which including a floppy
disk drive controller compatible with the industry standard 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 onto the W83787IF greatly
reduces the number of components required for interfacing with floppy disk drives. The W83787IF
supports four 360K, 720K, 1.2M, 1.44M disk drives and data transfer rates of 250Kb/S, 300Kb/S,
500Kb/S.
There are two high-speed serial communication ports (UARTs) on the W83787IF, one of them
support serial infrared communication. The UARTs include 16-byte send/receive FIFOs, a
programmable baud rate generator, complete modem control capability, and a processor interrupt
system.
The W83787IF supports three optional PC-compatible printer ports: 378h, 278h and 3BCh. Additional
bi-directional 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 W83787IF supports two embedded hard disk drive (AT bus) interfaces and a game port with
decoded read/write output.
The W83787IF'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 W83787IF allows pocket devices to be installed through the
printer interface pins in notebook computer applications according to a protocol set by Winbond, but
with upgraded performance.
The JOYSTICK mode allows a joystick to be connected to a parallel port with a signal switching
cable.
The configuration register supports address selection, mode selection, function enable/disable, and
power down function selection.
Publication ReleaseDate:Sep 1995
- 1 - Revision A1
1 page  
W83787IF
1.2 Serial Port Interface
SYMBOL PIN I/O
FUNCTION
CTSA
CTSB
34 I Clear To Send is the modem control input.
47 The function of these pins can be tested by reading Bit 4 of the
handshake status register.
DSRA
DSRB
33 I Data Set Ready. An active low indicates the modem or data set is ready
48 to establish a communication link and transfer data to the UART.
DCDA
DCDB
32 I Data Carrier Detect. An active low indicates the modem or data set has
49 detected a data carrier.
RIA
RIB
SINA
SINB
IRRX1
31 I Ring Indicator. An active low indicates that a ring signal is being
50 received by the modem or data set.
30 I Serial Input. Used to receive serial data from the communication link.
42 SINB can be programmed by CR0D register as input pin IRRX1 for
serial infrared communication
SOUTA
HURAS1
38 I/O UART A Serial Output. Used to transmit serial data out to the
communication link.
During power-on reset, this pin is pulled up internally and is defined as
HURAS1, which is used for selecting the I/O address of the UART A.
(See Table 1-2.)
SOUTB
HURBS1
IRTX1
43 I/O UART B Serial Output. Used to transmit serial data out to the
communication link. SOUTB can be programmed by CR0D register as
output pin IRTX1 for serial infrared communication.
O
During power-on reset, this pin is pulled up internally and is defined as
HURBS1, which is used for selecting the I/O address of UARTB. (See
Table 1-2.)
DTRA
HPRTAS0
35 I/O UART A Data Terminal Ready. An active low informs the modem or
data set that the controller is ready to communicate.
During power-on reset, this pin is pulled down internally and is defined
as HPRTAS0. It is used for selecting the address of the parallel port.
(See Table 1-3.)
DTRB
HURAS0
46 I/O UART B Data Terminal Ready. An active low informs the modem or
data set that controller is ready to communicate.
During power-on reset, this pin is pulled down internally and is defined
as HURAS0. It is used for setting the I/O address of UART A. (See
Table 1-2.)
Publication Release Date:Sep 1995
- 5 - Revision A1
5 Page 
W83787IF
Multi-Mode Parallel Port, continued
SYMBOL PIN I/O
FUNCTION
AFD
20 OD PRINTER MODE: AFD
An active low output from this pin causes the printer to auto feed a line
after a line is printed. This pin is pulled high internally. Refer to the
description of the parallel port for the definition of this pin in ECP and
EPP mode.
OD EXTENSION FDD MODE: RWC2
This pin is for Extension FDD B; its function is the same as that of the
RWC pin.
O EXTENSION ADAPTER MODE: XRD
This pin is the I/O read command for the Extension Adapter.
When the Extension Adapter base address is written to the Extension
Adapter address register, XRD and XWR go low simultaneously so
that the command register on the Extension Adapter can latch the
same base address.
EXTENSION 2FDD MODE: RWC2
OD
This pin is for Extension FDD A and B; its function is the same as that
of the RWC pin.
JOYSTICK MODE: VDD for joystick.
O
STB
19 OD PRINTER MODE: STB
An active low output is used to latch the parallel data into the printer.
This pin is pulled high internally. Refer to the description of the parallel
port for the definition of this pin in ECP and EPP mode.
- EXTENSION FDD MODE:
This pin is a tri-state output.
O EXTENSION ADAPTER MODE: XWR
This pin is the I/O write command for the Extension Adapter.
When the Extension Adapter base address is written to the Extension
Adapter address register, XRD and XWR go low simultaneously so
that the command register on the Extension Adapter can latch the
same base address.
- EXTENSION 2FDD MODE: This pin is a tri-state output.
O JOYSTICK MODE: VDD for joystick.
- 11 -
Publication Release Date:Sep 1995
Revision A1
11 Page | ||
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