SLAZ607V August   2014  – May 2021 MSP430F67621

 

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6.24 LCDB5

LCDB Module

Category

Functional

Function

Static DC charge can built up on dedicated COMx pins.

Description

If the device is set into LPMx.5, its dedicated COMx pins (not shared with GPIO function) are floating. External leakage paths to these pins can result in dedicated COMx pins being charged. This can lead to static DC voltages being applied to the external LCD display. This might cause long term over-stress to the LCD display and/or cause certain LCD segments to flare up when device wakes up from LPMx.5 mode.

Workaround

Connect a high-resistance resistor between the dedicated COM pins and Vss to permanently discharge the affected pins.