M34282E2GP MITSUBISHI [Mitsubishi Electric Semiconductor], M34282E2GP Datasheet - Page 14

• Manufacturer Part Number: M34282E2GP
• Description: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Fig. 14 Port CARR output control by timer 1
Fig. 15 Carrier wave generation example by timer 2
14
T i m e r 2 u n d e r f l o w s i g n a l
T i m e r 2 u n d e r f l o w s i g n a l
N o t e : W h e n t o e x p a n d “ H ” i n t e r v a l o f t h e c a r r i e r w a v e i s v a l i d , s e t “ 0 1
T i m e r 1 u n d e r f l o w
Port CARR output
• T i m e r 2 c a r r i e r w a v e g e n e r a t i o n f u n c t i o n i s v a l i d ( V 2
• “ L ” i n t e r v a l ( 0 3
• “ H ” i n t e r v a l ( 0 2
I n t h i s c a s e , t h e f o l l o w i n g i s s e t ;
N o t e : W h e n t i m e r 1 i s s t o p p e d , t h e p o r t C A R R o u t p u t a u t o - c o n t r o l i s t e r m i n a t e d r e g a r d l e s s o f b i t 2 ( V 1
T i m e r 2 c o u n t s o u r c e
T i m e r 2 c o u n t s o u r c e
T i m e r 2 c o u n t v a l u e
(Reload register)
T i m e r 2 c o u n t v a l u e
( R e l o a d r e g i s t e r )
T i m e r 1 u n d e r f l o w
Port CARR output
T o e x p a n d “ H ” i n t e r v a l o f c a r r i e r w a v e i s v a l i d ( V 2
(W h e n c o u n t s o u r c e i s 4 . 0 M H z , c a r r i e r w a v e i s e x p a n d e d f o r 1 2 5 n s ]
R e g i s t e r V 1
T o e x p a n d “ H ” i n t e r v a l o f c a r r i e r w a v e i s i n v a l i d ( V 2
[ C o u n t s o u r c e : 4 . 0 M H z , R e s o l u t i o n : 2 5 0 n s ]
C o u n t s o u r c e C A R R Y s e l e c t e d
C A R R Y
C A R R Y D
C A R R Y D
S e t t h e i n t e r v a l “ a ” t o t i m e r 1 . S e t t h e i n t e r v a l “ b ”
A u t o - c o n t r o l v a l i d
2
T i m e r 2 s t a r t s
1 6
“H”
“H”
T i m e r 2 s t a r t s
“ 1 ”
“ 0 ”
“ L ”
“ L ”
“ 1 ”
“ 0 ”
1 6
(R2L)
(R2L)
( V 1
( V 1
0 3
0 3
) o f c a r r i e r w a v e i s s e t t o r e l o a d r e g i s t e r R 2 L
) o f c a r r i e r w a v e i s s e t t o r e l o a d r e g i s t e r R 2 H
1 6
1 6
1
2
C a r r i e r w a v e o u t p u t s t a r t
“ H ”
“1”
“0”
“L”
) 0
) 1
T i m e r 1 s t a r t s
0 2
0 2
1 6
1 6
(V1
0 1
0 1
Carrier wave output start
0
1 6
1 6
) 1
0 0
00
t o r e l o a d r e g i s t e r R 1 .
1 6
16
( R 2 H )
( R 2 H )
0 2
0 2
1 6
1 6
3 c l o c k s
i n t e r v a l
3 . 5 c l o c k s
0 1
a
i n t e r v a l
1 6
0 1
C a r r i e r w a v e p e r i o d :
C a r r i e r w a v e p e r i o d :
Auto-control invalid
3
1 6
0 0
= “ 1 ” )
1 6
7 . 5 c l o c k s
0 0
MITSUBISHI
ELECTRIC
3
7 c l o c k s
= “ 0 ” )
1 6
03
(R2L)
1 6
16
Set the interval “c”
to reload register R1.
0 3
( R 2 L )
” o r m o r e t o r e l o a d r e g i s t e r R 2 H .
1 6
2
0 2
= “ 1 ” ) ,
1 6
02
16
01
16
0 1
b
1 6
0 0
1 6
00
A u t o - c o n t r o l i n v a l i d
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
16
02
(R2H)
16
(R2H)
02
3 clocks
interval
01
16
Set the interval “d”
to reload register R1.
3 . 5 c l o c k s
16
i n t e r v a l
C a r r i e r w a v e p e r i o d :
C a r r i e r w a v e p e r i o d :
0 0
0 1
MITSUBISHI MICROCOMPUTERS
1 6
1 6
7 . 5 c l o c k s
7 c l o c k s
03
(R2L)
0 0
c
2
T i m e r 1 s t o p
) o f r e g i s t e r V 1 .
( V 1
16
1 6
02
03
( R 2 L )
0
Carrier wave output stop
) 0
( N o t e )
16
16
0 1
0 2
1 6
1 6
0 0
0 1
4282 Group
1 6
1 6
d
02
( R 2 H )
0 0
16
1 6
( R 2 H )
0 1
0 2
1 6
1 6