352
Chapter 11
Watch Timer
Preliminary User’s Manual U15839EE1V0UM00
11.4 Operations
11.4.1 Selection of the Watch Timer Clock
With the settings of the clock generator different clocks can be assigned to the Watch Timer. With the
WTSELn bits (n = 0, 1) of the CKC register 6 different clocks can be switched as the Watch Timer clock.
Table 11-2:
Selection of the Watch Timer Clock
Note: WTSEL1 bit of CKC register
Remark:
X = don’t care
CKC Register
WTM Register
f
W
WDTSEL1
f
XXT
WDTSEL0
WTM7
f
X
= 4 MHz
f
X
= 5 MHz
0
f
X
/128
0
1
31250 Hz
39063 Hz
1
7813 Hz
9766 Hz
X
0
977 Hz
1221 Hz
1
f
XT
0
1
32000 Hz
1
8000 Hz
X
0
1000 Hz
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