M38867E8AHP MITSUBISHI [Mitsubishi Electric Semiconductor], M38867E8AHP Datasheet - Page 15

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M38867E8AHP

Manufacturer Part Number
M38867E8AHP
Description
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER??
Manufacturer
MITSUBISHI [Mitsubishi Electric Semiconductor]
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Fig. 11 Port block diagram (2)
S e r i a l I / O 1
s y n c h r o n o u s c l o c k s e l e c t i o n b i t
( 9 ) P o r t P 4
( 1 1 ) P o r t P 4
( 1 3 ) P o r t P 4
( 1 5 ) P o r t P 5
D a t a b u s
D a t a b u s
D a t a b u s b u f f e r e n a b l e b i t
D a t a b u s
1 . T h e i n p u t l e v e l c a n b e s w i t c h e d b e t w e e n C M O S c o m p a t i b l e i n p u t l e v e l a n d T T L l e v e l b y t h e P 4 i n p u t l e v e l s e l e c t i o n b i t o f t h e p o r t c o n t r o l
2 . T h e i n p u t l e v e l c a n b e s w i t c h e d b e t w e e n C M O S c o m p a t i b l e i n p u t l e v e l a n d T T L l e v e l b y t h e P 4 i n p u t l e v e l s e l e c t i o n b i t o f t h e p o r t c o n t r o l
3 . T h e i n p u t l e v e l c a n b e s w i t c h e d b e t w e e n C M O S c o m p a t i b l e i n p u t l e v e l a n d T T L l e v e l b y t h e i n p u t l e v e l s e l e c t i o n b i t o f t h e d a t a b u s b u f f e r
D a t a b u s
S e r i a l I / O 1 e n a b l e b i t
S e r i a l I / O 1 m o d e s e l e c t i o n b i t
r e g i s t e r 2 ( a d d r e s s 0 0 2 F
r e g i s t e r 2 ( a d d r e s s 0 0 2 F
T h e p o r t P 8 a n d p o r t P 4 i n p u t r e g i s t e r c a n b e s w i t c h e d b y t h e P 8 f u n c t i o n s e l e c t i o n b i t o f t h e p o r t c o n t r o l r e g i s t e r 2 ( a d d r e s s 0 0 2 F
c o n t r o l r e g i s t e r ( a d d r e s s 0 0 2 A
S e r i a l I / O 1 e n a b l e b i t
R e c e i v e e n a b l e b i t
S e r i a l I / O 1 e n a b l e b i t
O B F
S e r i a l I / O 1 c l o c k o u t p u t
P 4 o u t p u t s t r u c t u r e s e l e c t i o n b i t
O B F
P 4 o u t p u t s t r u c t u r e s e l e c t i o n b i t
2
1 0
4
6
0
O B F
o u t p u t e n a b l e b i t
0 0
D i r e c t i o n
r e g i s t e r
P o r t l a t c h
P o r t l a t c h
D i r e c t i o n
r e g i s t e r
P o r t l a t c h
o u t p u t e n a b l e b i t
D i r e c t i o n
r e g i s t e r
D i r e c t i o n
r e g i s t e r
P o r t l a t c h
P 4 o u t p u t s t r u c t u r e s e l e c t i o n b i t
0 0
O B F
o u t p u t
1 0
o u t p u t
1
2
1
2
1
2
I N T
1 6
1 6
) .
) .
S e r i a l I / O 1 i n p u t
0
i n t e r r u p t i n p u t
A
1 6
0
i n p u t
) .
S e r i a l I / O 1 e x t e r n a l c l o c k i n p u t
3
D a t a b u s b u f f e r
e n a b l e b i t
( 1 0 ) P o r t P 4
( 1 2 ) P o r t P 4
( 1 4 ) P o r t P 4
( 1 6 ) P o r t s P 5
D a t a b u s
D a t a b u s
D a t a b u s
D a t a b u s
D a t a b u s b u f f e r e n a b l e b i t
D a t a b u s b u f f e r f u n c t i o n
P 4
S e r i a l I / O 1 m o d e s e l e c t i o n b i t
S e r i a l I / O 1 e n a b l e b i t
5
S e r i a l I / O 1 r e a d y o u t p u t
/ T
S e r i a l I / O 1 o u t p u t
T r a n s m i t e n a b l e b i t
P 4 o u t p u t s t r u c t u r e s e l e c t i o n b i t
I N T
S e r i a l I / O 1 e n a b l e b i t
O B F
S
X
D P - c h a n n e l o u t p u t d i s a b l e b i t
3
5
7
R D Y 1
s e l e c t i o n b i t
O B F
1
2 0 ,
0 1
, P 5
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
P o r t l a t c h
P o r t l a t c h
D i r e c t i o n
r e g i s t e r
D i r e c t i o n
r e g i s t e r
D i r e c t i o n
r e g i s t e r
P o r t l a t c h
P o r t l a t c h
I N T
D i r e c t i o n
r e g i s t e r
o u t p u t e n a b l e b i t
o u t p u t e n a b l e b i t
0 1
2
3 0 ,
o u t p u t
, P 5
I N T
3
4 0
1
2
1
2
i n t e r r u p t i n p u t
I N T
S
MITSUBISHI MICROCOMPUTERS
0
, R , W i n p u t
1
i n t e r r u p t i n p u t
S
1
i n p u t
3
3
D a t a b u s b u f f e r
e n a b l e b i t
3886 Group
D a t a b u s b u f f e r f u n c t i o n
s e l e c t i o n b i t
1 6
) .
15

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