'PIC as a PLD (was Flash vs EEPROM)'
William Chops Westfield wrote:
> Consider, for example, a classic LED "chaser" circuit that lights 8 LEDs
> in sequence. You can do this in medium scale logic by wiring it up.
> You can do it with a PLD using PAL type languages and tools. That way you
> could stock one type of PAL to replace many types of logic chip It might
> sort of look like this:
> Q1 := /Q1 * /Q2 * /Q3 * /Q4 * /Q5 * /Q6 * /Q7 * /Q8 ; always supply 1 bit
> Q2 := Q1 ; Shift Left
> Q3 := Q2 ; Shift Left
> Q4 := Q3 ; Shift Left
> Q5 := Q4 ; Shift Left
> Q6 := Q5 ; Shift Left
> Q7 := Q6 ; Shift Left
> Q8 := Q7 ; shift Left
> And you could also do it with a PIC and software.
Sure can! If you want, check out how I use state machines to implement vertical
counters in a PIC:
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