Door-Close C I R C U I T - Tandy 1000 SL Technical Reference Manual

2-2-2-10.
Door-close c i r c u i t
Door-close c i r c u i t i s o p t i o n a l l y u s e d i n some s p e c i a l models w i t h t h e
d o o r - c l o s e d e t e c t i o n s w i t c h . The c i r c u i t i s e n c l o s e d i n t h e c o n t r o l
L S I ,
U 1
a n d i t g e n e r a t e s
DOOR
CLOSE o r DRIVE STATUS s i g n a l u s i n g
D C l / I X Z o u t p u t t e r m i n a l s a n d DcS/DCSW i n p u t t e r m i n a l s o f t h e L S I .
Refer
t o t h e S p e c i f i c a t i o n a n d S c h e m a t i c d i a g r a m a s t o t h e d e t a i l e d c o n d i t i o n
i n c l u d i n g t h e
DC1
%
DC4 s t r a p s .
--
- -
I n s t a n d a r d models w i t h o u t d o o r - c l o s e s w i t c h ,
DC1,
DC2, and DCSW
t e r m i n a l s of t h e
LSI a r e
open a n d t h e d o o r - c l o s e c i r c u i t i s n o t u t i l i z e d .
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243
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