Hi,
Although I understood that this is violating specification, I would like to know what is happen if we asserts 1kHz, 6Vp-p, 10 seconds to LCD ports (COM and SEG) when MSP430F674x is turned off (Vcc = 0[V]). This is because the customer would like to test LCD with their system board.
From IO circuit design point of view, what is the risk? Note that customer is not requesting us to gurantee the functionality after asserting signal.
regards,
Fukui