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Ihll I/O SIGNAL OPERATION AND FUNCTIONS I
6.1 OPERATION AND FUNCTIONS OF 2CN INPUT SIGNAL
6.1.1 Signal Timing
•SVON,AST, STOP,N-OT, P-OT, DEC,PCON
These signals are sampled every 2ms and read-in whenever the same levels are continued
more than two times. (2 to 4ms filter)
It is necessary to hold more than 5ms to be effective.
Example of AST Signal
,2ms _,
SAMPLING l- _ ,
, , I i. I ', [ ,-t
i ', i J ' I
AST ; ' " I ] I I
; I ' I , II+ . ,I I ;
READ-IN ,: I 'll : "l' I I :
F
(INEFFECTIVE) (EFFECTIVE)
•Since STP signal has a small filter, the above example is not applied.
6.1.2 Input Circuit (Refer to Fig. 5.7 for Connection.)
[ APPROX. 5mA 4.7k£2
o O _ - =
4.7kE2
- 95 -
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