| Electronics > Projects, Designs, and Technical Stuff |
| 20 bit up/down counter, anything more elegant than a bunch of cascaded 4516's? |
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| janoc:
--- Quote from: edavid on December 31, 2018, 05:10:58 pm --- --- Quote from: kony on December 31, 2018, 04:23:00 pm ---XC9572XL. Few lines of verilog, almost fully remappable pinout, under a 1$/pc even in small qty and with space to spare for other glue logic still. Or any other flavour of CPLD. --- End quote --- For those who have experience with these CPLDs, how many macrocells does it take to implement an up/down counter stage? --- End quote --- One cell of these is one flip-flop + some logic, so one bit of the counter ~ 1 cell. 9572 has 72 cells, there is also 9536 with 36 cells only (slightly cheaper but may not fit a 20 bit counter). |
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