R5F21133DFP RENESAS [Renesas Technology Corp], R5F21133DFP Datasheet - Page 33

• Manufacturer Part Number: R5F21133DFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY/R8C/Tiny SERIES
• Manufacturer: RENESAS [Renesas Technology Corp]

R8C/13 Group
Rev.1.20
REJ09B0111-0120
Figure 5.8 VCR1 Register and VCR2 Register
V o l t a g e d e t e c t i o n r e g i s t e r 1
V o l t a g e d e t e c t i o n r e g i s t e r 2
0 0 0 0
b 7
b7
N O T E S :
1 . T h e V C 1 3 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 ) . T h e
2 . 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 e s n o t a f f e c t t h i s r e g i s t e r .
N O T E S :
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 d ) 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 . S e t t h e V C 2 7 b i t t o “ 1 ” ( v o l t a g e d e t e c t c i r c u i t e n a b l e d ) w h e n h a r d w a r e r e s e t 2 i s u s e d .
3 . 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 e s n o t a f f e c t t h i s r e g i s t e r .
Jan 27, 2006
V C 1 3 b i t i s s e t t o “ 1 ” ( V
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 ) .
0 0
b 6
b6
A f t e r t h e V C 2 7 b i t i s s e t t o “ 1 ” , t h e v o l t a g e d e t e c t i o n c i r c u i t e l a p s e s f o r t
b 5
b5
0 0 0 0 0
b 4
b4
b 3
b3
0 0 0
b 2
b2
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b 1
b1
b 0
b0
C C
B i t s y m b o l
B i t s y m b o l
( b 2 - b 0 )
V C 1 3
( b 7 - b 4 )
V d e t o r 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 ) 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
(b6-b0)
VC27
Symbol
Symbol
VCR1
VCR2
( 1 )
Voltage monitor enable
bit
V o l t a g e m o n i t o r f l a g
Reserved bit
Reserved bit
Reserved bit
(2)
Address
Address
001A
0019
Bit name
Bit name
16
16
(1 )
Reset input : 00
RESET pin = “H” retaining : 10000000
After reset
00001000
After reset
0: Voltage detection circuit
1: Voltage detection circuit
0 : V
1 : V
d e t e c t i o n c i r c u i t d i s a b l e d
S h o u l d se t t o “ 0 ”
S h o u l d s e t t o “ 0 ”
S h o u l d s e t t o “ 0 ”
d ( E - A )
disabled
enabled
C C
C C
(2)
2
(3)
b e f o r e s t a r t i n g o p e r a t i o n .
< V d e t
16
V d e t o r v o l t a g e
F u n c t i o n
F u n c t i o n
5.4 Voltage Detection Circuit
2
R W
R W
R W
R W
R W
RW
R O