MN6221

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Melody-Alarm Generator

Pinout

DIP18
         +---\/---+
     Vdd | 1    18| Vss
      NO | 2    17| MI3
      PO | 3    16| MI2
      SI | 4    15| MI1
     SO1 | 5    14| EV2
     SO2 | 6    13| EV1
    TST1 | 7    12| OSC3
    TST2 | 8    11| OSC2
    ALON | 9    10| OSC1
         +--------+

Frequency

DIP18
Set reader to FREQ, put black probe to GND, red probe to 10,11 and 12 to measure CPU clock

External links

Files