Solving 82C55 Doubt: Usage & Examples

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The 82C55 is a programmable peripheral interface commonly used for interfacing with devices like keyboards, where it manages input and output operations. It is not necessary for simpler devices such as LCDs, which can often be driven directly by microcontrollers. Users seek application notes and examples to better understand its functionality and appropriate use cases. The discussion emphasizes the need for clarity on when to implement the 82C55 in various applications. Understanding its role enhances effective interfacing in microcontroller projects.
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I have a basic doubt about the usage pf 82C55.

Wanted to know when exactly it is used. Eg: For a keyboard you have to use a 82C55 but for a LCD it is not necessary. So when exactly do we use it??
 
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i.mehrzad said:
I have a basic doubt about the usage pf 82C55.

Wanted to know when exactly it is used. Eg: For a keyboard you have to use a 82C55 but for a LCD it is not necessary. So when exactly do we use it??

Can you give us some links to application notes for that PPI part? What are your thoughts on when and why it is used?
 

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