[sdiy] destroying flash memory cell on a PIC

[Eric Brombaugh]

On 3/17/21 9:26 AM, Richie Burnett wrote:
> But since SRAM is really just a bunch of D-type flip-flops I can't see 
> why this should cause it to eventually fail.

In most digital processes a high-density SRAM bit is not just a D 
flip-flop - typically it's cross-coupled arrangement of 4-6 MOS 
transistors in a stable loop where writing requires essentially forcing 
a new state on the loop by overriding the existing state. I could 
imagine that if the drive strengths of various transistors were not 
proportioned correctly that high currents could be consumed during the 
write operation, resulting in local heating that could build up during 
multiple writes in quick succession, leading to eventual damage. It's 
definitely *not* a forgivable mistake, but I can understand how it might 
happen.

Eric