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Clock Generator
4.3.1 Option byte 0000 007A
Address
Note
Table 4-21
Bit position
Bit name
7 to 6
STOPXTAL,
STOPRCZ
1
WDTMD1
0
RMOPIN
0000 007A
.
H
7
6
5
STOPXTAL STOPRCZ
0
Bits marked with "0" must not be changed from their value "0".
Setting of option byte 0000 007A
Selection of SubOSC mode:
STOPXTAL
STOPRCZ
0
1
other than above
Specifies WDT2 operation mode:
Count operation:
0:
Input clock:
Selectable by WDTM2 register. 240 KHz internal oscillator or
MainOSC.
Operation mode: Selectable by WDTM2 register. NMI interrupt
(INTWDT2) or reset mode (WDT2RES) selectable.
1: Count operation: Cannot be stopped.
Input clock: Fixed to 240 KHz internal oscillator.
Operation mode: Fixed to
Option that the 240 KHz internal oscillator can be stopped by software:
0: Can be stopped by software.
1: Cannot be stopped.
User's Manual U18743EE1V2UM00
H
4
3
2
0
0
0
H
Function
Sub oscillator setting
0
Crystal oscillator mode (32,768 KHz)
1
RC oscillator mode (20 KHz)
Can be stopped by WDM2.WDCS24.
reset mode (WDT2RES)
Chapter 4
1
0
WDTMD1
RMOPIN
Setting prohibited
.
189
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