Hello Jiri,
The “A” part numbers describes the differences among different S08P silicones (version 1.1, version 2.0, and version 2.1).
For example, MC9S08PA4AVTG is “A” part number, whereas MC9S08PA4VTG is old part number.
Version 1.1 – PA4 0N36F
“A” part
Version 2.0 – PA4 0N38J
Version 2.1 – PA4 0N22P
For detailed chip bugs, please refer to the corresponding chip ERRATA found here.
I hope this information will be useful for you.
If I misunderstood your question, feel free to let me know. I will be glad to help.
Have a great day.
David Diaz.
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