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Section 4 Resets
Initial
Bit
Bit Name
Value R/W
6
WT/IT
0
5
TME
0
4
PSS
0
3
RST/NMI
0
Rev. 1.00 May 09, 2008 Page 82 of 954
REJ09B0462-0100
Description
R/W
Timer Mode Select
Selects whether the WDT is used as a watchdog timer or
interval timer
0: Interval timer mode
1: Watchdog timer mode
Timer Enable
R/W
When this bit is set to 1, TCNT starts counting.
When this bit is cleared, TCNT stops counting and is
initialized to H'00.
Prescaler Select
R/W
Selects the clock source to be input to TCNT
0: Division clock of the prescaler (PSM) based on φ is
counted.
1: Division clock of the prescaler (PSM) based on φSUB is
counted.
Reset or NMI
R/W
Selects to request an internal reset or an NMI interrupt when
TCNT has overflowed.
0: An NMI interrupt is requested
1: An internal reset is requested
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