View source for 80c51

'''8-bit Microcontroller'''

=Pinout=
<pre>
DIP40
           +---\/---+
      P1.0 | 1    40| Vdd
      P1.1 | 2    39| P0.0/AD0
      P1.2 | 3    38| P0.1/AD1
      P1.3 | 4    37| P0.2/AD2
      P1.4 | 5    36| P0.3/AD3
      P1.5 | 6    35| P0.4/AD4
      P1.6 | 7    34| P0.5/AD5
      P1.7 | 8    33| P0.6/AD6
       RST | 9    32| P0.7/AD7
  RxD/P3.0 |10    31| *EA/Vpp
  TxD/P3.1 |11    30| ALE/*PROG
*INT0/P3.2 |12    29| *PSEN
*INT1/P3.3 |13    28| P2.7/A15
   T0/P3.4 |14    27| P2.6/A14
   T1/P3.5 |15    26| P2.5/A13
  *WR/P3.6 |16    25| P2.4/A12
  *RD/P3.7 |17    24| P2.3/A11
     XTAL2 |18    23| P2.2/A10
     XTAL1 |19    22| P2.1/A9
       Vss |20    21| P2.0/A8
           +--------+
</pre>

=Frequency=
'''DIP40'''<br>
Set reader to FREQ, put black probe to GND, red probe to 18 and 19 to measure CPU clock

=External links=
[http://en.wikipedia.org/wiki/Intel_MCS-51 80C52 page on Wikipedia]<br>
[http://www.cpu-world.com/CPUs/8051/index.html 80C52 page on CPU-World]

=Files=
<gallery widths="150px">
File:80c51.pdf|80C51 Datasheet
</gallery>

[[Category:CPU]]
[[Category:DIP40]]