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Dear attendees of the discussion forum, we got the following information from INFINEON concerning the FLASH module: --------------------------------------- SAx-C161CJ-16F20F/40F Step AC/AD SAx-C164CS-16F20F/40F Step AC/AD SAx-C164CS- 8F20F/40F Step AC/AD SAx-C167CI -16F20F/40F Step AC/AD Related to all temperatures and frequency for devices listed above. --------------------------------------- Problem: Code execution from internal flash module/ Operand read access from/to internal flash module The problem depends primarily on the internal CPU frequency and the number of wait states selected for the flash module ( bit field WSFLASH in register IMBCTR ). But ambient temperature and Vddi may have influence ( that is statistically more likely). If the problem occurs it will typically result in a class B trap ( program access error, indicated by flag PACER = 1 in register TFR )
Avoid the problem with the following settings and limits: a)ambient temperature: -40°C < Ta < + 85°C fCPU < 16 MHz 0 WS ( bit field WSFLASH = 00b ) 16 MHz < fCPU < 32 MHz 1 WS ( bit field WSFLASH = 01b ) Default after RESET fCPU > 32 MHz 2 WS ( bit field WSFLASH = 10b ) b) ambient temperature: Ta > 85°C fCPU < 16 MHz 0 WS ( bit field WSFLASH = 00b ) 16 MHz < fCPU < 28 MHz 1 WS ( bit field WSFLASH = 01b ) Default after RESET fCPU > 28 MHz 2 WS ( bit field WSFLASH = 10b )