m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 289

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Operation
Figure 2.16.5. Example of stop mode set-up
2.16.2 Stop Mode Set-Up
Settings and operation for entering stop mode are described here.
( 3 ) A l l c l o c k s o f f ( s t o p m o d e )
I n s e r t a t l e a s t f o u r N O P s f o l l o w i n g J M P . B i n s t r u c t i o n a f t e r t h e i n s t r u c t i o n t h a t s e t s t h e a l l c l o c k s t o p c o n t r o l b i t t o “ 1 ” .
A s t h i s r e g i s t e r b e c o m e s s e t t i n g m e n t i o n e d a b o v e w h e n
o p e r a t i n g w i t h X
t h e u s e r d o e s n o t n e e d t o s e t i t a g a i n .
W h e n o p e r a t i n g w i t h X
t o “ 0 ” b e f o r e s e t t i n g s y s t e m c l o c k s e l e c t b i t t o “ 0 ” . T h e b o t h
b i t s c a n n o t b e s e t a t t h e s a m e t i m e .
( 3 ) S e t t i n g o p e r a t i o n c l o c k a f t e r r e t u r n i n g f r o m s t o p m o d e
(1) Enables the interrupt used for returning from stop mode.
(2) Sets the interrupt enable flag (I flag) to “1”.
(3) Clearing the protection and setting all clock stop control bit to “1” stops oscillation and causes
b 7
( 3 ) C a n c e l i n g p r o t e c t
( 1 ) S e t t i n g i n t e r r u p t t o c a n c e l s t o p m o d e
b 7
b 7
b 7
( 2 ) I n t e r r u p t e n a b l e f l a g ( I f l a g )
0
( W h e n o p e r a t i n g w i t h X
the processor to go into stop mode.
0
D i s a b l e t h e i n t e r r u p t n o t t o b e u s e d f o r c a n c e l l i n g s t o p m o d e .
0 0 0 0
I N
page 280 of 354
I n t e r r u p t c o n t r o l r e g i s t e r
K U P I C
S i R I C ( i = 0 , 2 , 3 )
S 1 3 B C N I C
T A i I C ( i = 0 t o 4 )
S i T I C ( i = 0 t o 3 )
R S M I C
V B D I C
( c o u n t s o u r c e o f B C L K i s X
0
C I N
0 0
b 0
, s e t m a i n c l o c k ( X
b 0
b 0
b 0
1
1
I n t e r r u p t p r i o r i t y l e v e l s e l e c t b i t
M a k e s u r e t h a t t h e i n t e r r u p t p r i o r i t y
l e v e l o f t h e i n t e r r u p t w h i c h i s u s e d t o
c a n c e l t h e w a i t m o d e i s h i g h e r t h a n
t h e p r o c e s s o r i n t e r r u p t p r i o r i t y ( I P L ) o f
t h e r o u t i n e w h e r e t h e W A I T
i n s t r u c t i o n i s e x e c u t e d .
R e s e r v e d b i t
E n a b l e s w r i t i n g t o s y s t e m c l o c k c o n t r o l r e g i s t e r s 0 a n d 1 ( a d d r e s s e s 0 0 0 6
f r e q u e n c y s y n t h e s i z e r r e g i s t e r s ( a d d r e s s e s 0 3 D B
M a i n c l o c k ( X
A l l c l o c k s t o p c o n t r o l b i t
R e s e r v e d b i t
S y s t e m c l o c k s e l e c t b i t
P r o t e c t r e g i s t e r [ A d d r e s s 0 0 0 A
P R C R
R e s e r v e d b i t
S y s t e m c l o c k c o n t r o l r e g i s t e r 0
[ A d d r e s s 0 0 0 6
M u s t a l w a y s b e s e t t o “ 0 ”
S y s t e m c l o c k c o n t r o l r e g i s t e r [ A d d r e s s 0 0 0 7
C M 1
1 : A l l c l o c k s o f f ( s t o p m o d e )
M u s t a l w a y s b e s e t t o “ 0 ”
1 : W r i t e - e n a b l e d
M u s t a l w a y s b e s e t t o “ 0 ”
O n
X
I N
I N
, X
[ A d d r e s s 0 0 4 1
[ A d d r e s s 0 0 4 A
[ A d d r e s s 0 0 4 3
[ A d d r e s s 0 0 5 4
[ A d d r e s s 0 0 5 3
[ A d d r e s s 0 0 5 8
[ A d d r e s s 0 0 5 C
a f t e r r e t u r n i n g )
O U T
I N
I N
1 6
- X
I N
- X
] C M 0
) ,
O U T
O U T
“ 1 ”
1 6
1 6
1 6
1 6
1 6
1 6
1 6
) s t o p b i t
]
]
, 0 0 4 5
, 0 0 5 1
]
) s t o p b i t
, 0 0 4 2
]
1 6
1 6
1 6
A l l c l o c k s o f f ( s t o p m o d e )
, 0 0 4 7
, 0 0 4 F
, 0 0 5 5
1 6
]
1 6
1 6
1 6
b 7
A s t h i s r e g i s t e r b e c o m e s s e t t i n g m e n t i o n e d a b o v e w h e n o p e r a t i n g w i t h X
( c o u n t s o u r c e o f B C L K i s X
W h e n o p e r a t i n g w i t h X
s e l e c t b i t t o “ 1 ” . T h e b o t h b i t s c a n n o t b e s e t a t t h e s a m e t i m e .
, 0 0 5 7
, 0 0 4 D
]
b 7
1
( W h e n o p e r a t i n g w i t h X
1 6
0
1 6
1 6
, 0 0 5 9
]
]
1 6
1
1 6
t o 0 3 D F
]
I N
1 6
0 0
b 0
, s e t p o r t X c s e l e c t b i t t o “ 1 ” b e f o r e s e t t i n g s y s t e m c l o c k
)
b 0
C I N
I n t e r r u p t p r i o r i t y l e v e l s e l e c t b i t
R e s e r v e d b i t
I N T i I C ( i = 0 t o 2 )
S 1 R I C
S 0 2 B C N I C
M u s t a l w a y s b e s e t t o “ 0 ”
M a k e s u r e t h a t t h e i n t e r r u p t p r i o r i t y l e v e l o f t h e
i n t e r r u p t w h i c h i s u s e d t o c a n c e l t h e w a i t m o d e i s
h i g h e r t h a n t h e p r o c e s s o r i n t e r r u p t p r i o r i t y ( I P L ) o f
t h e r o u t i n e w h e r e t h e W A I T i n s t r u c t i o n i s e x e c u t e d .
R e s e r v e d b i t
) , t h e u s e r d o e s n o t n e e d t o s e t i t a g a i n .
P o r t X
S y s t e m c l o c k c o n t r o l r e g i s t e r 0
[ A d d r e s s 0 0 0 6
S y s t e m c l o c k s e l e c t b i t
M u s t a l w a y s b e s e t t o “ 0 ”
X
X
C I N
C I N
C I N
1 6
, X
C
- X
a f t e r r e t u r n i n g )
s e l e c t b i t
a n d 0 0 0 7
C O U T
C O U T
g e n e r a t i o n
1 6
] C M 0
1 6
) a n d
[ A d d r e s s 0 0 5 F
[ A d d r e s s 0 0 4 8
[ A d d r e s s 0 0 4 9
1 6
1 6
1 6
, 0 0 4 4
]
]
C I N
1 6
, 0 0 5 E
1 6
2. Power Control
]