SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
Fragmented frames have a special CRC32. Each fragment CRC32 is based on the previous fragements, so a running total. In addition TX_CRC_HIGH is inverted for all fragments expect the last fragment. The final fragement has a normal CRC which is based on the full frame.