SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
Uncorrectable errors include address errors and double-bit errors in data or ECC. When the ECC logic finds uncorrectable errors, the following information is logged in ECC registers if the ECC feature is enabled:
When an uncorrectable error occurs, the Flash module sets the UNC_ERR_INTFLG bit and generates an uncorrectable error interrupt. This uncorrectable error interrupt generates a non-maskable interrupt (NMI), if enabled, in the CPU. If an uncorrectable error interrupt flag is not cleared by writing to the UNC_ERR_INTCLR bit in the ERR_INTCLR register, the Flash module cannot generate new uncorrectable interrupt signals, as this is an edge-based interrupt.
Although ECC is calculated on 64-bit basis, a read of any address location within a 128-bit aligned Flash word causes the uncorrectable error flag to get set, and an uncorrectable error interrupt/NMI to occur, when there is a uncorrectable error in both or in either the lower 64 bits or upper 64 bits (or corresponding ECC check bits) of that 128-bit data word.