R5F21226JFP#U0 Renesas Electronics America, R5F21226JFP#U0 Datasheet - Page 145
R5F21226JFP#U0
Manufacturer Part Number
R5F21226JFP#U0
Description
IC R8C/22 MCU FLASH 48LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/22r
Datasheet
1.R5F21237DFPU0.pdf
(551 pages)
Specifications of R5F21226JFP#U0
Core Processor
R8C
Core Size
16/32-Bit
Speed
20MHz
Connectivity
CAN, I²C, LIN, SIO, SSU, UART/USART
Peripherals
POR, Voltage Detect, WDT
Number Of I /o
41
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-LQFP
For Use With
R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
R5F21226JFP#U0R5F21226JFP#U1
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
R5F21226JFP#U0R5F21226JFP#V0
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 145 of 551
- Download datasheet (6Mb)
R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
13. Watchdog Timer
The watchdog timer is a function to detect when the program is out of control. To use the watchdog timer is
recommend for improving reliability of a system. The watchdog timer contains a 15-bit counter and can select count
source protection mode is enabled or disabled.
Table 13.1 lists the Count Source Protection Mode
Refer to 5.5 Watchdog Timer Reset for details of the watchdog timer reset.
Figure 13.1 shows the Block Diagram of Watchdog Timer, Figure 13.2 shows Registers OFS and WDC and Figure
13.3 shows Registers WDTR, WDTS, and CSPR.
Figure 13.1
Table 13.1
Count Source
Count Operation
Count Start Condition
Count Stop Condition
Reset Condition of Watchdog
Timer
Operation at the Time of
Underflow
CPU clock
Internal reset signal
NOTE:
1. When the CSPRO bit is set to 1 (count source protection mode enabled), 0FFFh is set.
Write to WDTR register
(“L” active)
Count Source Protection Mode
Block Diagram of Watchdog Timer
Item
Page 123 of 501
Prescaler
1/128
1/16
CPU clock
Decrement
Either of following can be selected
• After reset, count starts automatically
• Count starts by writing to WDTS register
Stop mode, wait mode
• Reset
• Write 00h to the WDTR register before writing FFh
• Underflow
Watchdog timer interrupt or
watchdog timer reset
WDC7 = 1
WDC7 = 0
Count Source Protection
fOCO-S
Mode Disabled
CSPRO = 0
CSPRO = 1
Watchdog timer
Low-speed on-chip oscillator
clock
None
Watchdog timer reset
Count Source Protection
Set to
7FFFh
Mode Enabled
(1)
CSPRO: Bit in CSPR register
WDC7: Bit in WDC register
PM12: Bit in PM1 register
13. Watchdog Timer
PM12 = 0
Watchdog timer
interrupt request
PM12 = 1
Watchdog
timer reset
Related parts for R5F21226JFP#U0
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
KIT STARTER FOR M16C/29
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C/2D
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
R0K33062P STARTER KIT
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C/23 E8A
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C/25
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER H8S2456 SHARPE DSPLY
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C38C
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C35C
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8CL3AC+LCD APPS
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR RX610
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R32C/118
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT DEV RSK-R8C/26-29
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR SH7124
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR H8SX/1622
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT DEV FOR SH7203
Manufacturer:
Renesas Electronics America
Datasheet: