6809

8-bit Microprocessor

Pinout

DIP40
        +---\/---+
    GND |1     40| *HALT
   *NMI |2     39| EXTAL
   *IRQ |3     38| XTAL
  *FIRQ |4     37| *RST
     BS |5     36| MRDY
     BA |6     35| Q
    VCC |7     34| E
     A0 |8     33| *BREQ
     A1 |9     32| R/*W
     A2 |10    31| D0
     A3 |11    30| D1
     A4 |12    29| D2
     A5 |13    28| D3
     A6 |14    27| D4
     A7 |15    26| D5
     A8 |16    25| D6
     A9 |17    24| D7
    A10 |18    23| A15
    A11 |19    22| A14
    A12 |20    21| A13
        +--------+

Frequency

Set reader to FREQ, put black probe to GND, red probe to 38 / 39 to measure CPU clock

External links

6809 page on Wikipedia
6809 page on CPU-World

Files

• 

  MC6809 Datasheet