R5F21122FP#U0 Renesas Electronics America, R5F21122FP#U0 Datasheet - Page 66

• 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 11.2 OFS, WDC, WDTR , and WDTS Registers
Watchdog timer reset register
O p t i o n f u n c t i o n s e l e c t r e g i s t e r
b 7
b7
Watchdog timer start register
1
N O T E S :
Watchdog timer control register
b7
b7
1 . T h e O F S r e g i s t e r c a n n o t b e c h a n g e d i n a p r o g r a m . W r i t e u s i n g a f l a s h w r i t e r .
Jan 27, 2006
b 6
1
b6
0
b 5
1 1 1 1 1
b5
0
b 4
b4
b 3
b3
b 2
b2
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b 1
b1
b 0
b0
b0
B i t s y m b o l
( b 7 - b 1 )
b0
W D T O N
The watchdog is initialized after a write instruction to this register.
The watchdog timer value is always initialized to “7FFF
whatever value is written.
Bit symbol
(b4-b0)
The watchdog timer starts counting after a write instruction to this register.
WDC7
S y m b o l
(b5)
(b6)
O F S
Symbol
WDC
Symbol
( 1 )
Symbol
WDTR
WDTS
W a t c h d o g t i m e r
s t a r t s e l e c t b i t
R e s e r v e d b i t
B i t n a m e
Reserved bit
Reserved bit
Prescaler select bit
High-order bit of watchdog timer
Bit name
A d d r e s s
0 F F F F
0 : T h e w a t c h d o g t i m e r s t a r t s a u t o m a t i c a l l y a f t e r r e s e t
S e t t o “ 1 ”
1: The watchdog timer is inactive after reset
Address
Address
000F
Address
000D
000E
1 6
16
16
Function
16
Function
B e f o r e s h i p m e n t
Indeterminate
Indeterminate
00011111
Must set to “0”
0 : Divided by 16
1 : Divided by 128
Must set to “0”
After reset
After reset
After reset
F u n c t i o n
F F
1 6
2
Function
16
” regardless of
11. Watchdog Timer
RW
RW
RW
RW
RO
R W
RW
RW
WO
RW
RW
WO