M37212 Mitsubishi, M37212 Datasheet - Page 102

• Manufacturer Part Number: M37212
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
• Manufacturer: Mitsubishi

Structure of Register
The figure of each register structure describes its functions, contents
at reset, and attributes as follows:
102
< E x a m p l e >
C P U M o d e R e g i s t e r
b 7 b 6 b 5 b 4 b 3 b 2 b 1 b 0
N o t e s 1 : V a l u e s i m m e d i a t e l y a f t e r r e s e t r e l e a s e
r e l e a s e
2 : B i t a t t r i b u t e s • • • • • • T h e a t t r i b u t e s o f c o n t r o l r e g i s t e r b i t s a r e c l a s s i f i e d i n t o 3 t y p e s : r e a d - o n l y , w r i t e - o n l y
1
1
0 • • • • • • • • • • • • • • • • • • “ 0 ” a f t e r r e s e t r e l e a s e
1 • • • • • • • • • • • • • • • • • • “ 1 ” a f t e r r e s e t r e l e a s e
I n d e t e r m i n a t e • • • I n d e t e r m i n a t e a f t e r r e s e t
R• • • • • • R e a d
0
0
R
–
0 , 1
6 , 7
3 , 4
B
2
• • • • • • R e a d e n a b l e d
• • • • • • R e a d d i s a b l e d
5
C P U m o d e r e g i s t e r ( C P U M ) ( C M ) [ A d d r e s s 0 0 F B
P r o c e s s o r m o d e b i t s
( C M 0 , C M 1 )
S t a c k p a g e s e l e c t i o n
b i t ( S e e n o t e ) ( C M 2 )
C l o c k s w i t c h b i t s
( C M 6 , C M 7 )
: B i t i n w h i c h n o t h i n g i s a s s i g n e d
F i x t h e s e b i t s t o “ 1 . ”
N o t h i n g i s a s s i g n e d . T h i s b i t i s w r i t e d i s a b l e b i t .
W h e n t h i s b i t i s r e a d o u t , t h e v a l u e i s “ 1 . ”
M37212M4/M8–XXXSP, M37212M6–XXXSP/FP
a n d r e a d a n d w r i t e . I n t h e f i g u r e , t h e s e a t t r i b u t e s a r e r e p r e s e n t e d a s f o l l o w s :
B i t p o s i t i o n
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
N a m e
V a l u e s i m m e d i a t e l y a f t e r r e s e t r e l e a s e
b 1 b 0
0 : 0 p a g e
1 : 1 p a g e
b 7 b 6
0 0 : S i n g l e - c h i p m o d e
0 1 :
1 0 :
1 1 :
0 0 : f ( X
0 1 : f ( X
1 0 : f ( X
1 1 : D o n o t s e t
W• • • • • • W r i t e
F u n c t i o n s
I N
I N
I N
N o t a v a i l a b l e
) = 8 M H z
) = 1 2 M H z
) = 1 6 M H z
W
–
• • • • • • W r i t e e n a b l e d
• • • • • • W r i t e d i s a b l e d
• • • • • • “ 0 ” c a n b e s e t b y s o f t w a r e , b u t “ 1 ”
with ON-SCREEN DISPLAY CONTROLLER
c a n n o t b e s e t .
B i t a t t r i b u t e s
1 6
MITSUBISHI MICROCOMPUTERS
]
A f t e r r e R W
0
1
0
1
1
( N o t e 1 )
M37212EFSP/FP
R W
R W
R W
R W
R W
( N o t e 2 )
Rev. 1.0