SPRUJ52C june 2022 – july 2023 AM69 , AM69A , TDA4AH-Q1 , TDA4AP-Q1 , TDA4VH-Q1 , TDA4VP-Q1
As a safety function, LSE integrates a CRC signature capture mechanism on each output channel data to verify the integrity of the HWA internal paths. When enabled (VPAC_MSC_LSE_CFG_LSE[8] PSA_EN), every valid transfer frame data from the MSC is passed through a CRC module to update the signature for the channel before the data is packed and sent to the SL2 buffer. At the end of frame condition, the final signature is saved in a separate read-only signature register (VPAC_MSC_LSE_PSA_SIGNATURE_y[31-0] VAUE = 0,...,Number_of_Output Channel-1) till the next end of frame condition for software to read and compare it against the golden reference signature.
The PSA signature register is based on the following IEEE 802.3 standard 32-bit CRC polynomial:
x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x + 1
The PSA module is inserted in the LSE data path as shown in Figure 6-110.