Dead-band Thermostat

target and actual are unsigned temperatures from 32 through 255.

Behavior

• heater_on=1 only when actual is strictly below target-5.
• cooler_on=1 only when actual is strictly above target+5.
• Inside the inclusive band from target-5 through target+5, both outputs are 0.
• Both outputs must never be active at the same time.
• The circuit is combinational and has no reset.