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INTERFACING TO
MCS·80/8S™
PROGRAMMABLE PERIPHERAL
COMPONENTS
The MCS·85 shares with the MCS-80 a wide
range
of
peripheral components
that
solve
system problems and provide the designer
with
a great deal
of
flexibility in his
I/O,
Interrupt and
DMA structures. The
MCS-85 is directly com·
patible
with these peripherals, and, with the ex·
ception
of
the 8257-5 DMA controller, needs no
additional
circuitry
for
their
interface
in a
minimum system. The
8257-5
DMA controller
uses an
8212
latch and some gating
to
support
the
multiplexed bus
of
MCS-85.
PROGRAMMABLE PERIPHERALS
The
list
of
programmable peripherals for use
with the
8085A includes:
8251A Programmable Communications
Interface
8253-5
Programmable Interval Timer
8255A-5
Programmable Peripheral Inter·
8257-5
8259-5
8271
8273
8275
8278
8279
face
Programmable DMA Controller
Programmable Interrupt Con·
troller
Diskette Controller
Synchronous Data Link Con-
troller
CRT Controller
Keyboard/Display Controller
Keyboard/Display Controller
The MCS-80/85 peripheral compatibility assures
the
designer.
that
all new peripheral com-
ponents from Intel will interface
to
the MCS-85
bus structure
to
further expand the application
spectrum
of
MCS-85.
BOB5A
BOB5A
ALE
1-11
CONTROL
BUS
SERIAL I/O
MEMil.
lOR.
M"EMw.
lOW