r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 214

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r5f21346mnfp

Manufacturer Part Number
r5f21346mnfp
Description
Single-chip Mcus Incorporates The R8c Cpu Core
Manufacturer
Renesas Electronics Corporation.
Datasheet

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Part Number
Manufacturer
Quantity
Price
Part Number:
r5f21346mnfp#V0
Manufacturer:
Renesas Electronics America
Quantity:
10 000
R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
14.2
14.2.1
Note:
14.2.2
Note:
14.2.3
b7 to b0 Writing 00h and then FFh to this register initializes the watchdog timer.
b7 to b0 A write instruction to this register starts the watchdog timer.
1. The PM12 bit is set to 1 when 1 is written by a program (and remains unchanged even if 0 is written to it).
1. Write the WDTR register during the count operation of the watchdog timer.
After Reset
After Reset
After Reset
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Bit
Bit
Address 0005h
Address 000Dh
Address 000Eh
This bit is automatically set to 1 when the CSPRO bit in the CSPR register is set to 1 (count source protection
mode enabled).
Set the PRC1 bit in the PRCR register to 1 (write enabled) before rewriting the PM1 register.
Symbol
Symbol
Symbol
Registers
Symbol
The initial value of the watchdog timer is specified by bits WDTUFS0 and WDTUF1 in the OFS2
register.
Bit
Bit
Bit
PM12
Processor Mode Register 1 (PM1)
Watchdog Timer Reset Register (WDTR)
Watchdog Timer Start Register (WDTS)
b7
b7
b7
X
X
0
(1)
Reserved bits
WDT interrupt/reset switch bit
Nothing is assigned. If necessary, set to 0. When read, the content is 0.
Reserved bit
b6
b6
b6
X
X
0
Bit Name
b5
b5
b5
X
X
0
b4
b4
b4
X
X
0
Set to 0.
0: Watchdog timer interrupt
1: Watchdog timer reset
Set to 0.
Function
Function
b3
b3
b3
0
X
X
PM12
b2
b2
b2
X
X
0
Function
(1)
b1
b1
b1
X
X
0
b0
b0
b0
X
X
0
14. Watchdog Timer
Page 182 of 740
R/W
R/W
R/W
R/W
R/W
R/W
W
W

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