8255: Difference between revisions
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| Line 5: | Line 5: | ||
DIP40 | DIP40 | ||
+---\/---+ | +---\/---+ | ||
PA3 | 1 40| PA4 | |||
PA2 | 2 39| PA5 | |||
PA1 | 3 38| PA6 | |||
PA0 | 4 37| PA7 | |||
*RD | 5 36| *WR | |||
*CS | 6 35| RESET | |||
GND | 7 34| D0 | |||
A1 | 8 33| D1 | |||
A0 | 9 32| | A0 | 9 32| D2 | ||
PC7 |10 31| D3 | |||
PC6 |11 30| D4 | |||
PC5 |12 29| D5 | |||
PC4 |13 28| D6 | |||
PC0 |14 27| D7 | |||
PC1 |15 26| Vcc | |||
PC2 |16 25| PB7 | |||
PC3 |17 24| PB6 | |||
PB0 |18 23| PB5 | |||
PB1 |19 22| PB4 | |||
PB2 |20 21| PB3 | |||
+--------+ | +--------+ | ||
</pre> | </pre> | ||
Revision as of 13:11, 29 September 2009
Programmable Peripheral Interface
Pinout
DIP40
+---\/---+
PA3 | 1 40| PA4
PA2 | 2 39| PA5
PA1 | 3 38| PA6
PA0 | 4 37| PA7
*RD | 5 36| *WR
*CS | 6 35| RESET
GND | 7 34| D0
A1 | 8 33| D1
A0 | 9 32| D2
PC7 |10 31| D3
PC6 |11 30| D4
PC5 |12 29| D5
PC4 |13 28| D6
PC0 |14 27| D7
PC1 |15 26| Vcc
PC2 |16 25| PB7
PC3 |17 24| PB6
PB0 |18 23| PB5
PB1 |19 22| PB4
PB2 |20 21| PB3
+--------+
Frequency
Set reader to FREQ, put black probe to GND, red probe to 15 to measure CPU clock
External links
Files
-
Intel D8255A Datasheet -
DCD D8255 Datasheet
