Hot!LCD Charge Pump Usage for PIC16LF19197

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daredevil
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2018/05/24 13:57:23 (permalink)
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LCD Charge Pump Usage for PIC16LF19197

Hello,
 
I am trying to drive a segmented LCD display with the PIC16LF19197 microcontroller. I am new to using microcontrollers, and I've been trying to figure out how the LCD charge pump works for the controllers in this family.
 
I am powering the board with two AAA batteries (1.5V each, 3V total). The controller is using one Common and a pin per segment (static bias mode).
 
If I configure the controller in the M0 configuration, does that simply raise the LCDBIAS3 to an independent voltage (up to 3.6V), or does it raise each SEG pin to the 3.6V value? 
 
Ideally this would allow the charge pump to compensate for a partially discharged battery which would give the device a longer life.
 
(Is there anything that I need to make my question clearer / more specific?)
 
EDIT: Changed the Micro to actually be the right part....
post edited by daredevil - 2018/06/06 14:13:09
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    daredevil
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    Re: LCD Charge Pump Usage for PIC16LF19197 2018/06/13 06:31:31 (permalink)
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    I finally got some hardware testing going and it seems as though the charge pump powers all the LCD segments as hoped. It works as long as VDD is above the micro minimum, and raises it to the value determined in your code. Very useful!
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