Notes On Using Low Voltage/Cpu Operating Detection Reset Circuit - Fujitsu F2MCTM-16LX Hardware Manual

19.5 Notes on Using Low Voltage/CPU Operating Detection
Reset Circuit
This section explains the note on using the low voltage/CPU operating detection reset
circuit.
Notes on Using Low Voltage Detection Reset Circuit
Disabled operating stop from program
The low voltage detection reset circuit operates continuously after the power supply is turned on and the
operating stabilization wait time passes. Operating can not be stopped with software.
Operating at STOP mode
Low voltage detection reset keeps operating at the STOP mode. Therefore, if a low voltage is detected in
the STOP mode, reset is generated and the STOP mode is canceled.
Notes on Using CPU Operating Detection Reset Circuit
Disabled operating stop from program
CPU operating detection reset circuit operates continuously after turning on the power supply. Operating
cannot be stopped with software.
Reset generation control of CPU operating detecting function
CPU operating detecting function should clear the counter at regular intervals. The counter is cleared by
writing "0" to the CL bit of the LVRC register, and the reset generation can be controlled.
Stop and clear of counter
In the mode CPU stops operating, CPU operating detecting function clears the counter and stops operating.
Operation in sub-oscillation mode
The CPU operation detection function will stop operation in sub-oscillation mode. For this reason, also use
the watchdog reset function.
CHAPTER 19 LOW VOLTAGE DETECTION/CPU OPERATING DETECTION RESET
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