SIR System Initialization Registers. 0x40000400 read-only 0x00 0x400 registers SIR_STATUS System Initialization Status Register. 0x00 read-only CFG_VALID Configuration Valid Flag. 0 1 read-only CFG_ERR Configuration Error Flag. 1 1 read-only SIR_ADDR Read-only field set by the SIB block if a CRC error occurs during the read of the OTP memory. Contains the failing address in OTP memory (when CRCERR equals 1). 0x04 read-only ADDR 0 32