R5F21122FP#U0 Renesas Electronics America, R5F21122FP#U0 Datasheet - Page 177

• Manufacturer Part Number: R5F21122FP#U0
• Description: IC R8C MCU FLASH 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/12r

Specifications of R5F21122FP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, 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 8x10b
• 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/12 Group
Rev.1.20
REJ09B0110-0120
Figure 19.1 Example of Procedure for Changing Interrupt Factor
19.2.5 Changing Interrupt Factor
The IR bit in the interrupt control register may be set to “1” (interrupt requested) when the interrupt
factor is changed. When using an interrupt, set the IR bit to “0” (interrupt not request) after changing
the interrupt factor. In addition, the changes of interrupt factors include all elements that change the
interrupt factors assigned to individual software interrupt numbers, polarities, and timing. Therefore,
when a mode change of the peripheral functions involves interrupt factors, edge polarities, and timing,
set the IR bit to “0” (interrupt not requested) after the change. Refer to each peripheral function for the
interrupts caused by the peripheral functions.
Figure 19.1 shows an Example of Procedure for Changing Interrupt Factor.
Jan 27, 2006
page 165 of 181
N O T E S :
• I R b i t : T h e i n t e r r u p t c o n t r o l r e g i s t e r b i t o f a n i n t e r r u p t w h o s e
1 . E x e c u t e t h e a b o v e s e t t i n g i n d i v i d u a l l y . D o n o t e x e c u t e t w o
2 . U s e t h e I f l a g f o r t h e I N T i ( i = 0 t o 3 ) i n t e r r u p t .
3 . R e f e r t o “ 1 9 . 2 . 6 C h a n g i n g I n t e r r u p t C o n t r o l R e g i s t e r ” f o r t h e
o f t h e i n t e r r u p t w h o s e f a c t o r i s c h a n g e d .
o r m o r e s e t t i n g s a t o n c e ( b y o n e i n s t r u c t i o n ) .
T o p r e v e n t i n t e r r u p t r e q u e s t s f r o m b e i n g g e n e r a t e d w h e n
u s i n g p e r i p h e r a l f u n c t i o n i n t e r r u p t s o t h e r t h a n t h e I N T i
i n t e r r u p t f a c t o r . I n t h i s c a s e , u s e t h e I f l a g w h e n a l l
m a s k a b l e i n t e r r u p t s c a n b e d i s a b l e d . W h e n a l l m a s k a b l e
i n t e r r u p t s c a n n o t b e d i s a b l e d , u s e t h e I L V L 0 t o I L V L 2 b i t s
i n s t r u c t i o n s t o b e u s e d a n d t h e i r u s a g e n o t e s .
S e t I R b i t t o “ 0 ” ( i n t e r r u p t n o t r e q u e s t e d ) u s i n g
f a c t o r i s c h a n g e d
C h a n g e i n t e r r u p t f a c t o r ( i n c l u d i n g m o d e o f
I n t e r r u p t f a c t o r c h a n g e
p e r i p h e r a l f u n c t i o n s )
D i s a b l e I n t e r r u p t
E n a b l e i n t e r r u p t
Change completed
M O V i n s t r u c t i o n
(2 , 3 )
(2 , 3 )
(3 )
19. Usage Notes