9. Timers
Rev.3.00 Jul. 19, 2007 page 247 of 532
REJ09B0397-0300
Example: With 30 ms overflow period when
φ
= 4 MHz (
φ
/8192 selected)
Therefore, 256 – 15 = 241 (H'F1) is set in TCW.
4
×
10
6
×
30
×
10
–3
= 14.6
8192
TCW overflow
H'FF
H'00
Internal reset signal
H'F1
TCW
count value
H'F1 written
to TCW
H'F1 written to TCW
Reset generated
Start
512
φ
osc clock cycles
Figure 9.9 Example of Watchdog Timer Operation
9.6.4
Watchdog Timer Operating Modes
Watchdog timer operating modes are shown in table 9.15.
Table 9.15 Watchdog Timer Operating Modes
Operating
mode
Reset
Active
Sleep
Watch
Subactive
Subsleep
Standby
TCW Reset Functions
Functions
Halted Halted Halted Halted
TCSRW Reset
Functions Functions Retained Retained Retained Retained
TMW
Reset
Functions Retained Retained Retained Retained Retained
Содержание F-ZTAT H8 Series
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