Fujitsu 8FX

MB95630H Series
294 FUJITSU SEMICONDUCTOR LIMITED MN702-00009-2v0-E
CHAPTER 17 CLOCK SUPERVISOR COUNTER
17.3 Operations
● Clock Supervisor Counter Operation 3
The counter stops counting if it reaches "255". It cannot count further than "255".
Figure 17.3-3 Clock Supervisor Counter Operation 3
● Clock Supervisor Counter Operation 4
If the external clock selected stops, the counter stops counting. According to this counter stop,
the software identifies that the external clock selected is in the abnormal state.
Figure 17.3-4 Clock Supervisor Counter Operation 4
● Clock Supervisor Counter Operation 5
The counter is cleared to "0" by the software if the CMCEN is set to "0" while the counter is
operating.
Figure 17.3-5 Clock Supervisor Counter Operation 5
Selected time-base
timer interval
Main/Sub-oscillation clock
CMCEN
Internal counter
CMDR register
0
0 255
255
Selected time-base
timer interval
Main/Sub-oscillation clock
CMCEN
Internal counter
CMDR register
0
0
Selected time-base
timer interval
Main/Sub-oscillation clock
CMCEN
Internal counter
CMDR register
Software setting
00
0