8255: Difference between revisions

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{| style="float: right;" border="1" cellpadding="4" cellspacing="0"
|+ style="background:silver" | Equivalence table
!Rebadged as
!Found on PCB (manufacturer)
|-
|IGS003 || IGS
|-
|KD89C55A || Subsino
|}
'''Programmable Peripheral Interface'''
'''Programmable Peripheral Interface'''


Line 5: Line 15:
DIP40
DIP40
         +---\/---+
         +---\/---+
     Vss | 1    40| *RES
     PA3 | 1    40| PA4
     RDY | 2    39| out
     PA2 | 2    39| PA5
     out | 3    38| S0
     PA1 | 3    38| PA6
     IRQ | 4    37| in
     PA0 | 4    37| PA7
      NC | 5    36| NC
    *RD | 5    36| *WR
     NMI | 6    35| NC
     *CS | 6    35| RESET
     YNC | 7    34| R
     GND | 7    34| D0
    Vcc | 8    33| D0
      A1 | 8    33| D1
       A0 | 9    32| D1
       A0 | 9    32| D2
      A1 |10    31| D2
    PC7 |10    31| D3
      A2 |11    30| D3
    PC6 |11    30| D4
      A3 |12    29| D4
    PC5 |12    29| D5
      A4 |13    28| D5
    PC4 |13    28| D6
      A5 |14    27| D6
    PC0 |14    27| D7
      A6 |15    26| D7
    PC1 |15    26| Vcc
      A7 |16    25| A15
    PC2 |16    25| PB7
      A8 |17    24| A14
    PC3 |17    24| PB6
      A9 |18    23| A13
    PB0 |18    23| PB5
     A10 |19    22| A12
     PB1 |19    22| PB4
     A11 |20    21| Vss
     PB2 |20    21| PB3
         +--------+
         +--------+
</pre>
</pre>


=Frequency=
=Frequency=
Set reader to FREQ, put black probe to GND, red probe to 15 to measure CPU clock<BR>
No frequency to check


=External links=
=External links=
Line 37: Line 47:
File:d8255a.pdf|Intel D8255A Datasheet
File:d8255a.pdf|Intel D8255A Datasheet
File:d8255.pdf|DCD D8255 Datasheet
File:d8255.pdf|DCD D8255 Datasheet
File:d8255b.pdf|8255A Datasheet
</gallery>
</gallery>


[[Category:CPU]]
[[Category:Other Chips]]
[[Category:DIP40-600mil]]

Latest revision as of 15:31, 9 November 2017

Equivalence table
Rebadged as Found on PCB (manufacturer)
IGS003 IGS
KD89C55A Subsino

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

No frequency to check

External links

Files

  • Intel D8255A Datasheet

    Intel D8255A Datasheet

  • DCD D8255 Datasheet

    DCD D8255 Datasheet

  • 8255A Datasheet

    8255A Datasheet

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