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a.
Basic Input Mode
DATA
BUS'
~
= =
=::
::
J
___________
_
b.
Basic Output Mode
DATA
BUS·
OUTPUT
·DATA
BUS
TIMING
IS
SHOWN
IN FIGURE
7.
Figure
14.
Basic
1/0
Timing Waveform
TIMER
IN
TIMER
OUT
(PULSE)
TIMER
OUT
(SQUARE
WAVE)
LOAD
COUNTER
FROM
CLR
--I
I 2 I 1 I
\ (NOTE 1) "
~
___
J
\ I
\
(NOTE
1( I
'--------_..1
NOTE 1:
THE
TIMER
OUTPUT IS PERIODIC IF
IN
AN
AUTOMATIC
RELOAD
MODE
,!M1
MODE
BIT'"
')
Figure 15. Timer Output Waveform Countdown from 5
to
1
6·95
RELOAD
COUNTER FROM
CLR
-I
I 2 I 1