SPRZ423K October 2014 – May 2024 TMS320F28075 , TMS320F28075-Q1 , TMS320F28076
Flash: A Single-Bit ECC Error May Cause Endless Calls to Single-Bit-Error ISR
B, C
When a single-bit ECC error is detected, the CPU executes the single-bit-error interrupt service routine (ISR). When the ISR returns, the same instruction that caused the first error is fetched again. If the ECC error threshold (ERR_THRESHOLD.THRESHOLD) is 0, then the same error is detected and another ISR is executed. This continues in an endless loop. This sequence of events only occurs if the error is caused by a program fetch operation, not a data read.
Set the error threshold bit-field (ERR_THRESHOLD.THRESHOLD) to a value greater than or equal to 1. Note that the default value of the threshold bit-field is 0.