0
\$\begingroup\$

In numerous articles by IC manufacturers and measurement device makers, I've encountered references to LIN PID indicating the expected length of data bytes in the response.

ID Range(Dec)   Data Length
0-31             2
32-47            4
48-63            8

However, upon reviewing the "LIN_Specification_Package_2.2A" document, I found that this requirement is not included.

does is PID and Data length relation is mandatory one ?

\$\endgroup\$

1 Answer 1

Reset to default
0
\$\begingroup\$

However, upon reviewing the "LIN_Specification_Package_2.2A" document, I found that this requirement is not included.

The document states this: -

enter image description here

I think that's clear enough without being too specific (it cannot specific of course because different systems will use different data filed lengths).

For the protected identifier (PID), it is defined by the user as a means of ensuring that disparate systems cannot somehow be used together irrationally. Basically it can be thought of as a destination address i.e. it refers to a specific slave that is being asked to respond.

\$\endgroup\$
2
  • \$\begingroup\$ by this statement, i can able to send 8 byte of data for all unconditional frames right? \$\endgroup\$
    – PARTHA SARATHI Ravi
    Commented Mar 15 at 6:04
  • \$\begingroup\$ A frame can carry between one and eight bytes if data. As to whether this is appropriate for the system you are designing is up to you to ensure. \$\endgroup\$
    – Andy aka
    Commented Mar 15 at 8:23

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.