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TRANSMITJ
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NOTE
2
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VCC
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VCC
VCC
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SEE
NOTE
4
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A
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NOTE1:
TRAP,
INTR,
AND
HOLD
MUST
BE
GROUNDED
IF
THEY
AREN'T
USED,
NOTE
2:
USE 101M
FOR
STANDARD
1/0
MAPPING.
USE
A15
FOR
MEMORY
MAPPED
I/O.
NOTE
3.
CONNECTION
IS
NECESSARY
ONLY
IF
ONE
TWA
IT
STATE
IS
DESIRED.
PROG/CE
CE
READY
ClK
lOR
A
a
·A
lO
8355/8755A
RESET
101M
iNA
iffi
ALE
PAo·PA
7
AD
O
·AD
7
PB
O
·PB
7
GJND
I
VCC
CE
8156
RESET
101M
PAo·PA
7
WR
RD
ALE
PBO'P~
PCa-PC5
AD
O
·AD
7
TIMER
IN
TIMER
OUT
G)ND
I
VCC
NOTE
4:
PUll·UP
RESISTORS
RECOMMENDED
TO
AVOID
SPURIOUS
SelECTION
WHEN
iW
AND
WR
ARE
3-STATED.
FIGURE
2.
MINIMUM SYSTEM CONFIGURATION
A1-3
PORT
A (8)
PORT
B (8)
PORT
A (8)
PORT B 18)
PORTC
16)
..
>
)
>