Section 11 Watchdog Timer (WDT)
Rev. 3.00 Sep. 27, 2007 Page 406 of 758
REJ09B0243-0300
Bit Bit
Name
Initial
Value
R/W Description
5 RSTS
0 R/W
Reset
Select
Selects the type of reset when the WTCNT overflows in
watchdog timer mode. In interval timer mode, this setting
is ignored.
0: Power-on reset
1: Manual reset
4 WOVF
0 R/W
Watchdog
Timer
Overflow
Indicates that the WTCNT has overflowed in watchdog
timer mode. This bit is not set in interval timer mode.
0: No overflow
1: WTCNT has overflowed in watchdog timer mode
3
IOVF
0
R/W
Interval Timer Overflow
Indicates that the WTCNT has overflowed in interval timer
mode. This bit is not set in watchdog timer mode.
0: No overflow
1: WTCNT has overflowed in interval timer mode
2 to 0
CKS[2:0]
000
R/W
Clock Select 2 to 0
These bits select the clock to be used for the WTCNT
count from the eight types obtainable by dividing the
peripheral clock (P
φ
). The overflow period that is shown
inside the parenthesis in the table is the value when the
peripheral clock (P
φ
) is 40 MHz.
000: P
φ
(6.4
µ
s)
001: P
φ
/4 (25.6
µ
s)
010: P
φ
/16 (102.4
µ
s)
011: P
φ
/32 (204.8
µ
s)
100: P
φ
/64 (409.6
µ
s)
101: P
φ
/256 (1.64 ms)
110: P
φ
/1024 (6.55 ms)
111: P
φ
/4096 (26.21 ms)
Note: If bits CKS2 to CKS0 are modified when the WDT
is operating, the up-count may not be performed
correctly. Ensure that these bits are modified only
when the WDT is not operating.
Содержание SH7124 R5F7124
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Страница 68: ...Section 2 CPU Rev 3 00 Sep 27 2007 Page 48 of 758 REJ09B0243 0300 ...
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Страница 400: ...Section 9 Multi Function Timer Pulse Unit 2 MTU2 Rev 3 00 Sep 27 2007 Page 380 of 758 REJ09B0243 0300 ...
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