R5F21132FP#U0 Renesas Electronics America, R5F21132FP#U0 Datasheet - Page 36

• Manufacturer Part Number: R5F21132FP#U0
• Description: IC R8C MCU FLASH 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/13r

Specifications of R5F21132FP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521134EPB00 - KIT EMULATOR PROBE FOR PC7501R0E521134CPE00 - EMULATOR COMPACT R8C/13
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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
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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