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Correction, comment........Please!!!

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laktronics

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Hi,
The connections match with PC's standard parallel port signals and can be interfaced to it. All signals at pins 1,14,17 are inverted bits. Signal at pin16 and pins2 to 9 are noninverted outputs.
Regards,
Laktronics
 

H_D_R

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laktronics said:
Hi,
The connections match with PC's standard parallel port signals and can be interfaced to it. All signals at pins 1,14,17 are inverted bits. Signal at pin16 and pins2 to 9 are noninverted outputs.
Regards,
Laktronics

yes laktronics is right.

i think since @ 1, 14 pin are connected to READ and WRITE (which are active low) you need to connet then with +5V via pullup resistors.

please cross check it before implment.
visit the following link and check the connection.
i know circuit is different but main concept of 8255 connection with parallel port will be same. am i right??

-->> **broken link removed**
 

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