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How to set stop mode to reduce power consumption?

Latest Updated:03/20/2017

Question:

I set STOP mode (RAM hold) to reduce the power consumption in case of power supply voltage decrease, but when a reset occurs due to voltage decrease, the clock starts oscillating again.

Answer:

In V850E devices, the main system clock's oscillation stabilization time at startup is secured by reset so to set the optimum rise time. Consequently, the main system clock will oscillate whenever there is a reset.

The events that you are reporting are the device's specified operations.
To set RAM hold while operating under a decreased power supply voltage, a reset must be avoided.

Remark
V850/S and V850ES core products are configured so that the main system clock's oscillation is stopped when a reset occurs.
Suitable Products
V850 Family