View source for 8253

'''Programmable Interval Timer'''

=Pinout=
<pre>
DIP24
         +---\/---+
      D7 | 1    24| Vcc
      D6 | 2    23| *WR
      D5 | 3    22| *RD
      D4 | 4    21| *CS
      D3 | 5    20| A1
      D2 | 6    19| A0
      D1 | 7    18| CLK2
      D0 | 8    17| OUT2
    CLK0 | 9    16| GATE2
    OUT0 |10    15| CLK1
   GATE0 |11    14| GATE1
     GND |12    13| OUT1
         +--------+
</pre>

=Frequency=
'''DIP24'''<br>
Set reader to FREQ, put black probe to GND, red probe to 9,15,18 to measure CPU clock

=External links=

=Files=
<gallery widths="150px">
File:d8253c.pdf|D8253C Datasheet
</gallery>

[[Category:Other Chips]]
[[Category:DIP24]]