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W65C51S PDF даташит

Спецификация W65C51S изготовлена ​​​​«WDC» и имеет функцию, называемую «Asynchronous Communications Interface Adapter».

Детали детали

Номер произв W65C51S
Описание Asynchronous Communications Interface Adapter
Производители WDC
логотип WDC логотип 

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W65C51S Даташит, Описание, Даташиты
www.DataSheet4U.com
W65C51S
Asynchronous Communications
Interface Adapter (ACIA)
3/7/2006









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W65C51S Даташит, Описание, Даташиты
WDC reserves the right to make changes at any time without notice in order to improve design and
supply the best possible product. Information contained herein is provided gratuitously and without
www.DataSheet4liUa.bcoimlity, to any user. Reasonable efforts have been made to verify the accuracy of the information
but no guarantee whatsoever is given as to the accuracy or as to its applicability to particular uses.
In every instance, it must be the responsibility of the user to determine the suitability of the
products for each application. WDC products are not authorized for use as critical components in
life support devices or systems. Nothing contained herein shall be construed as a recommendation
to use any product in violation of existing patents or other rights of third parties. The sale of any
WDC product is subject to all WDC Terms and Conditions of Sales and Sales Policies, copies of
which are available upon request.
Copyright 1981 2006 by The Western Design Center, Inc. All rights reserved, including the right
of reproduction, in whole, or in part, in any form.
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W65C51S Даташит, Описание, Даташиты
DESCRIPTION
The WDC CMOS W65C51S Asynchronous Communications
Interface Adapter (ACIA) provides an easily implemented,
program controlled interface between 8-bit microprocessor
based systems and serial communication data sets and
modems.
The ACIA has an internal baud rate generator. This feature
eliminates the need for multiple component support circuits,
a crystal being the only other part required. The Transmitter
baud rate can be selected under program control to be either 1
www.DataSheet4oUf 1.c5omdifferent rates from 50 to 19,200 baud, or at 1/16 times
an external clock rate. The Receiver baud rate may be
selected under program control to be either the Transmitter
rate or at 1/16 times the external clock rate. The ACIA has
programmable word lengths of 5, 6, 7 or 8 bits; even, odd or
no parity; 1, 1½ or 2 bit stops.
The ACIA is designed for maximum-programmed control
from the microprocessor (MPU) to simplify hardware
implementation. Three separate registers permit the MPU to
easily select the W65C51S operating modes and data
checking parameters and determine operational status.
The Command Register controls parity, receiver echo mode,
transmitter interrupt control, the state of the RTSB line,
receiver interrupt control and the state of the DTRB line.
The Control Register controls the number of stop bits, word
length, receiver clock source and baud rate.
The Status Register indicates the states of the IRQB, DSRB,
and DCDB lines, Transmitter and Receiver Data Registers
and Overrun, Framing and Parity Error conditions.
The Transmitter and Receiver Data Registers are used for
temporary data storage by the ACIA Transmit and Receiver
circuits.
RxC
XTLI
XTLO
RTSB
CTSB
TxD
DTRB
4 3 2 1 28
5
6
7
8 W65C51S
9
10
11
12 13 14 15 16
27 26
25
24
23
22
21
20
19
17 18
DB7
DB6
DB5
DB4
DB3
DB2
D1
Figure 1 W65C51S ACIA
28 Pin PLCC
FEATURES
Low power CMOS N-well silicon gate
technology
Replacement for CMD / GTE Harris / MOS
Technology / GE/RCA / Synertek / Motorola /
Rockwell R6551, 65SC51, 65C51, 6551,
CPD65C51, 6551, 6850
Full duplex operation with buffered receiver
and transmitter
Data set/modem control functions
Internal baud rate generator with 15
programmable baud rates (50 to 19,200)
Program-selectable internally or externally
controlled receiver rate
Programmable word lengths, number of stop
bits and parity bit generation and detection
Programmable interrupt control
Program reset
Program-selectable serial echo mode
Two chip selects
2 or 4 MHz operation
5.0 VDC ± 5% supply requirements
28 pin plastic DIP package
28 pin PLCC package
Full TTL compatibility
Compatible with 65xx and 68xx
microprocessors
VSS
CS0
CS1B
RESB
RxC
XTLI
XTLO
RTSB
CTSB
TxD
DTRB
RxD
RS0
RS1
1 28
2 27
3 26
4 25
5 24
6 23
7 W65C51S 22
8 21
9 20
10 19
11 18
12 17
13 16
14 15
RWB
PHI2
IRQB
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
DSRB
DCDB
VDD
Figure 2 W65C51S ACIA 28 Pin DIP
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Номер в каталогеОписаниеПроизводители
W65C51SAsynchronous Communications Interface AdapterWDC
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