?? evm ballot unit info.txt
字號:
port 1: votecast LED panel
port 2: candidate panel
candidate's 4-bit long code : p0.0, p0.1, p0.2, p0.3 (transmit to control unit)
ready signal: p3.4(receive frm control unit)
vote signal: p3.5(receive frm control unit)
buzzer: p3.6
machine ready LED: p3.7
p0.4-p0.7: no connection
p3.0-p3.3: no connection
imp: ground of control unit must be connected to ground of ballot unit
connect p0.0, p0.1, p0.2, p0.3 of ballot unit to p2.0, p2.1, p2.3, p2.4 of control unit, respectively
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