258 State machine of an impulse counter

258 : State machine of an impulse counter

Design render
  • Author: Adrian Novosel
  • Description: This design is not meant to be a standalone circuit. It is a state machine of my bachelor's thesis project which was also submitted to Tiny Tapeout. This submittal will be used for debugging and will give a better insight into the working principle of its source design. (https://github.com/DinkoOletic/tt04-wokwi_unizgfer_multich_pulse_counter_v01a)
  • GitHub repository
  • View in Wokwi
  • Clock: 0 Hz

How it works

By clocking the state machine adress pins a2, a1 and a0 change their values every 12 clocks. Shift/load pin is set to 1 and then back to zero every 12 clocks. Other outputs are used for debugging.

How to test

After an impulse on reset pin and a subsequent impulse on the ovf pin, you can start clocking the circuit. Adress pins marked with "a" should follow the sequence: "100"->"000"->"001"->"010"->"011"->"000". Shift/load pin wil be set to 1 after every adress change and then set back to 0 on the next clock. The sequence will repeat itself.

IO

#InputOutputBidirectional
0resetcounter flop1a2
1ovfcounter flop2a1
2clkcounter flop3a0
3bi oecounter flop4shift/load
4zerosm flop1
5onesm flop 2
6global resetsm flop 3
7ovfsm flop 4

Chip location

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