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PDF 6551 Data sheet ( Hoja de datos )
| Número de pieza | 6551 | |
| Descripción | ASYNCHRONOUS COMMUNICATION INTERFACE ADAPTER | |
| Fabricantes | Commodore | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 6551 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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, . .commodore
~ aamiconduct:ar group
~~@~
MPS
6551
ASSYNCH RONOUS
COMMUNICATION
INTERFACE
ADAPTER
[ 6551 ASYNCHRONOUS COMMUNICATION INTERFACE ADAPTER
CONCEPT:
The 6551 is an Asynchronous Communication Adapter (ACIA) intended to provide for interfacing the 6500/6800
microprocessor families to serial communication data sets and modems. A unique feature is the inclusion of an
on-chip programmable baud rate generator, with a crystal being the only external com pone t required.
FEATURES:
• On-chip baud rate generator: 15 programmable baud
rates derived from a standard 1.8432 M Hz external
crystal (50 to 19,200 baud).
• Programmable interrupt and status register to simplify
software design.
• Single +5 volt power supply.
• Serial echo mode.
• False start bit detection.
• 8-bit bi-directional data bus for direct communicati~
)
-standard baud rates (up
engths; number of stop bits; and
nd detection.
control signals provided.
:¥ep';' none, mark, space).
r half-duplex operation.
9 bit transmission.
ORDER NUMBER
MXS 6551
PACKAGE DESIGNATOR
C = CERAMIC
P = PLASTIC
6551 PIN CONFIGURATION
GND 1
2
3
4
5
6
7
RTS 8
CTS 9
TxD 10
l5'i'R 11
RxD 12
RSO 13
RS1 14
28 R/W
27 ~2
26 iRa
25 DB7
24 DB6
23 DB5
22 DB4
21 DB3
20 DB2
19 DB1
18 DBO
17 DSR
16 DCD
15 Vce
2-129
1 page  
MPS
6551
Figure 2.
Write Timing Characteristics
02 - - - - - _ . . . . #
~---- tCYC -~-------..,
~-tC---"'1
I r - - - - - VIH
VIL
eSa, CS1 , RSa, RS1
====1.--------- VIH
RNi
VIL
- k -L·_t_D_C_W_ _ _ _tH_W_-"""""'ii
VVIIHL
DATABUS _ _ _-------~
fYee = 5.0V ± 5%, TA = 0 to 70oe, unless otherwise noted)
Charactertlllc
Cycle Time
92 Pulse W,dlh
Address Set-Up Time
Address HOld Time
Data Bus Set-Up Time
Data Bus Hold Time
(I, and 11- 101030 nsl
Symbol
ICVC
IC
IACW
ICAH
twcw
ICWH
IDew
IHW
8551
Min Max
1.0 40
470
180
180
300
10
8551A
Min Max
0.5 40
235
90
90
150
10
Un"
IJS
Clock Generation
XTALl 6
o
6551
INTERNAL CLOCK
EXTERNAL
CLOCK
XTAL 1 6
OPEN
CIRCUIT
XTAl2 7
EXTERNAL CLOCK
I
Figure 3.
Read Timing Characteristics
flJ2
-----~--
CSa, CS1, RSa, RS,
DATA BUS
fYee = 5.0V ± 5%, TA = 0 to 700 e, unless otherwise noted)
Charactertotlc
Cyc~Tlme
Pul.e Wldlh (~21
Add'es. SeI·Up Time
Address Hold Time
RiW Set·Up Time
Read Access Time
Read Hold Time
(~and tl- 101030 n81
Symbol
ICvC
IC
IACR
tCAR
twCR
ICDR
tHR
l16li1
Min Mu
1.0 40
470
180
180
395
10
85111 A
Min Max
0.5 40
235
90
90
200
10
Un"
1'.
2-133
Test Load for Data Bus (OBO"OB7)
TXI), 15Tft, RTS Outputs
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet 6551.PDF ] | |
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