The VLE I'm talking about is this: https://www.st.com/resource/en/user_manual/cd00161395-variable-length-encoding-vle-extension-programming-interface-manual-stm

The VLE I'm talking about is this: https://www.st.com/resource/en/user_manual/cd00161395-variable-length-encoding-vle-extension-programming-interface-manual-stmicroelectronics.pdf https://www.st.com/resource/en/user_manual/cd00161395-variab... This may be a vendor-specific extension though?