Spectravideo MKI, Сервисное – Техническое руководство, Страница: 100 / 134

MODEM / CPU Int er f a ce P in As s i g nme n t s - [IA R S- 2 3 2 C
P in
1
2
3
4
5
7
20
1 6
2 5
Func t i on
P ro t e c t ive Ground
T r a n sm i t te d D a ta ( Data Out )
Rece i v e d Data
( Da t a I n )
Re que s t to S end
C l e a r t o Send
S i gna l G r ound
D a t a T e rm i n a l Ready
R dy / Bu s y Output ( R dy=OV , Busy= + 5V )
S t a r t / S top Inpu t ( S t a r t =OV , S t op=+ 5V )
( 1 6
and 2 5 a re o p t i on a l f e a t u r e s )
The Hodem / CPU in t e r f a c e ca b l e and conne c t o r con f o rm to EIA RS-23 2 C and
Eu rope an C C I TT V . 2 4 s t anda r d s and i s a 2 5-p i n ( DB- 2 5 P ) conne c t or . The
ma t i ng conne c t or , loca t e d connec t o r , loc a t e d on the da t a s e t or acou s t i c
coup l e r , shou ld be a DB- 2 5S o r e qua l . S igna l s to p i ns 4 and
20 are
supp l i e d by the SV I-805 .
4 . 67