Low Vcc [1.5Vx2] operating MCU how to…

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oookey

Joined May 24, 2010
70
Hi all,
I’m going to do a project using 12F615 & powered by 3V [1.5Vx2 ] batteries, is there a way to program by pickit2, the source code is written in mikroC.

when i changed the Vdd to 3.0 in the picket2, i got a warning, ref to image below.

Thanks

Oookey
12F615-Spec.jpg 12F615-Spec.jpg 3vProgram.jpg
 

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ScottWang

Joined Aug 23, 2012
7,397
I think you should using +5v for the picket2, because the warning shown that the erase operation needs 4.5V, it's more then two new about 3.2V batteries, when you complete the programming, then the power source for 12F615 can be using 2.0V to 5.5V.
 

ErnieM

Joined Apr 24, 2011
8,377
You're looking at the wrong doc: try DS41284, Flash Memory Programming Specification. TABLE 7-1 will show you Bulk erase ONLY needs 4.5-5.5V on Vdd to work, all other functions work down to 2V.

Just keep the batteries out of the device when programming and let the PICkit provide 4.5 to 5.5 V to power the chip. Do insure this is not too great for any other chips connected to the same power rail.
 
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