MSP430F6779A: About Capacitor Required For Internal Charge Pump for LCD_C

Hi Luke,

Is it ok to use a minimum capacitor value of 4.7uF (not sure because of tolerance)?

Do I need to choose a capacitor value higher than 4.7 uF to guarantee a minimum value > 4.7 uF (with tolerance)?

Hi Luke,

what happened if using capacitor a little bit lower than 4.7 uF. (e.g. 3.0 uF ~ 4.6 uF)?

e.g. the LCD module can damage after long time operating or somethings?

I have a test with a 1 uF capacitor.
After 48 hours, the LCD module will shut down with the LCDNOCAPIFG flag set.

I think if I use a capacitor slightly below 4.7 uF
(e.g. 4.7uF - 10%) The LCD module may turn off or be damaged after several days of use, is that correct?

Could i know about what mechanism the MCU detect capacitance and then set LCDNOCAPIFG?

Hi Tink,

I'll have to get back to you on Monday with information that I might be able to share.

Regards,
Luke