Hi all,
I new comer in MSP430 series.
I want to know IF I use RTC in MSP430F149 is there any backup battery is require to power on controller?
I connect ACLK as 32768Hz crystal & Timer_A use.
Regards
Tectona
You should keep the voltage of the microcontrolled above 1.8 for the memory to be retained. Also, You should use the low power modes if you want to save juice =D
the msp430 has some great power saving features. By using the lp osc, setting the timer so it interrupts once a second (that;'s why you are using a 32768 hz xtal) and placing the processor in the lowest power state, you will draw very little current. do every thing in the ISR. several of the timerA samples show much of this. You should get years out of a watch battery.
so, the short answer is no, you don’t need a backup battery.