Document Number: 002-08488 Rev.*C

Page 13 of 24

MB3793-27D/28D/30D

Figure 8-5 Clock Pulse Input Supplementation (Positive Clock Pulse)

CTW

CK1

CK2

*

*

Note : The MB3793 watchdog timer monitors Clock1 (CK1) and Clock2 (CK2) pulses alternately.

When a CK2 pulse is detected after detecting a CK1 pulse, the monitoring time setting capacity

Therefore, the second and later pulses will be ignored even if only CK1 or CK2 pulses are input

continuously like * (the * pulse is ignored in the example above).