R5F21133DFP RENESAS [Renesas Technology Corp], R5F21133DFP Datasheet - Page 34
R5F21133DFP
Manufacturer Part Number
R5F21133DFP
Description
16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY/R8C/Tiny SERIES
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R5F21133DFP.pdf
(224 pages)
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R5F21133DFP#U0
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 34 of 224
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R8C/13 Group
Rev.1.20
REJ09B0111-0120
Figure 5.9 D4INT Register
V o l t a g e d e t e c t i o n i n t e r r u p t r e g i s t e r
b 7
N O T E S :
1 0 . T h e s o f t w a r e r e s e t o r t h e w a t c h d o g t i m e r r e s e t d o n o t a f f e c t t h i s r e g i s t e r .
1 1 . W h e n t h e D 4 6 b i t i s s e t t o “ 1 ” ( h a r d w a r e r e s e t 2 w h e n V d e t p a s s e s ) , s e t t h e D 4 7 b i t t o “ 1 ” ( b e l o w V d e t ) .
1 . S e t t h e P R C 3 b i t i n t h e P R C R r e g i s t e r t o “ 1 ” ( w r i t e e n a b l e ) b e f o r e w r i t i n g t o t h i s r e g i s t e r .
2 . I f t h e v o l t a g e d e t e c t i o n i n t e r r u p t n e e d s t o b e u s e d t o g e t o u t o f s t o p m o d e a g a i n a f t e r o n c e u s e d f o r t h a t
3. V a l i d w h e n t h e V C 2 7 b i t i n t h e V C R 2 r e g i s t e r i s s e t t o “ 1 ” ( v o l t a g e d e t e c t i o n c i r c u i t e n a b l e d ) .
4 . I f t h e V C 2 7 b i t i s s e t t o “ 0 ” ( v o l t a g e d e t e c t i o n c i r c u i t d i s a b l e d ) , t h e D 4 2 a n d D 4 3 b i t s a r e s e t t o “ 0 ” ( n o t d e t e c t e d ) .
5 . T h i s b i t i s s e t t o “ 0 ” b y w r i t i n g a “ 0 ” i n a p r o g r a m . ( w r i t i n g a “ 1 ” h a s n o e f f e c t . )
6 . V a l i d w h e n t h e D 4 0 b i t i s s e t t o “ 1 ” ( v o l t a g e d e t e c t i o n i n t e r r u p t e n a b l e d ) .
7 . T h e D 4 0 b i t i s v a l i d w h e n t h e V C 2 7 b i t i n t h e V C R 2 r e g i s t e r i s s e t t o “ 1 ” ( v o l t a g e d e t e c t i o n c i r c u i t e n a b l e d ) .
8 . V a l i d w h e n t h e D 4 1 b i t i s s e t t o “ 1 ” ( d i g i t a l f i l t e r d i s a b l e d m o d e ) .
9 . T h e D 4 6 b i t c a n b e s e l e c t e d .
Jan 27, 2006
p u r p o s e , r e s e t t h e D 4 1 b i t b y w r i t i n g a “ 0 ” a n d t h e n a “ 1 ” .
W h e n s e t t i n g t h e D 4 0 b i t t o “ 1 ” , t h e f o l l o w i n g s e t t i n g i s r e q u i r e d .
( 1 ) S e t t h e V C 2 7 b i t “ 1 ” .
( 2 ) W a i t f o r t d ( E - A ) u n t i l t h e d e t e c t e r c i r c u i t o p e r a t e s .
( 3 ) W a i t f o r t h e s a m p l i n g t i m e ( t h e s a m p l i n g c l o c k w h i c h i s s e l e c t e d i n t h e D F 0 b i t t o D F 1 b i t t i m e s 4 c y c l e s . )
( 4 ) S e t t h e D 4 0 b i t t o “ 1 ” .
( 5 ) S e t t h e C M 1 4 b i t i n t h e C M 1 r e g i s t e r t o “ 0 ” ( l o w - s p e e d o n - c h i p o s c i l l a t o r o n ) .
b 6
( D o n o t s e t t o “ 0 ” ) .
b 5
b 4
b 3
b 2
page 23 of 205
b 1
b 0
Bit symbol
D 4 0
D 4 1
D 4 2
D 4 3
D F 0
DF1
D 4 6
D47
Symbol
D4INT
Voltage detection condition
select bit
Voltage detection interrupt
enable bit
Voltage detection digital filter
disable mode select bit
Voltage change detection
flag
WDT overflow detect flag
Sampling clock select bit
Voltage monitor mode select
bit
(1)
(6)
(3, 4, 5)
Address
001F
(11)
B i t n a m e
(7)
16
Reset input : 00
RESET pin = H retaining : 01000001
After reset
(3, 4)
b 5b 4
0 :
1 :
0 : D i g i t a l f i l t e r e n a b l e m o d e ( d i g i t a l
1 : D i g i t a l f i l t e r d i s a b l e m o d e ( d i g i t a l
0 : N o t d e t e c t e d
1 : V d e t p a s s i n g d e t e c t i o n
0: Not detected (flag clear)
1: Detected
00 : f
01 : f
10 : f
11 : f
0 : V o l t a g e d e t e c t i o n i n t e r r u p t
1 : H a r d w a r e r e s e t 2 w h e n
V o l t a g e d e t e c t i o n i n t e r r u p t
r e q u e s t i s g e n e r a t e d
o r h a r d w a r e r e s e t 2
w h e n V c c p a s s e s V d e t
0 : O v e r V d e t
1 : B e l o w V d e t
f i l t e r c i r c u i t e n a b l e d )
f i l t e r c i r c u i t d i s a b l e d )
r e q u e s t i s g e n e r a t e d w h e n
p a s s i n g t h r o u g h V d e t
p a s s i n g t h r o u g h V d e t
D i s a b l e
E n a b l e
(10)
RING-S
RING-S
RING-S
RING-S
16
divided by 1
divided by 2
divided by 4
divided by 8
F u n c t i o n
5.4 Voltage Detection Circuit
( 9 )
2
R W
R W
R W
R W
R W
RW
RW
R W
R W
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