This application note explains how to use the hardware CRC module on NXP Flexis AC microcontrollers, including the MC9S08AC128, to verify software integrity and data.
AN3795 provides a technical overview and implementation guide for the Cyclic Redundancy Check (CRC) hardware module within the NXP Flexis AC family, specifically the MC9S08AC128. The document compares hardware-based CRC against software solutions, demonstrating significant performance gains in execution speed—reducing a 128K flash check from 6.7 seconds to 170 ms. It details the mathematical foundations of CRC, including modulo two arithmetic and polynomial division, and confirms compliance with the CRC16-CCITT standard (ITU-T V.41). The note includes example C code for module initialization, flash verification, and message augmentation.
MC9S08AC128
NXP
This application note will explain the fundamental principles behind cyclic redundancy checking, it’s implementation in the MC9S08AC128, and how it can be used to meet the embedded control software safety requirements by verifying the softw
| MC9S08AC128 | NXP | This application note will explain the fundamental principles behind cyclic redundancy checking, it’s implementation in the MC9S08AC128, and how it can be used to meet the embedded control software safety requirements by verifying the softw |
