The base address of the IEC is not fixed, but is determined by the APB address decoding and can be different for any particular system implementation.

All reserved or unused address locations must not be accessed because this can result in unpredictable behavior of the device.

All reserved or unused bits of writable registers must be written as zero, and ignored on read unless otherwise stated in the relevant text.

All register bits are reset to logic 0 by a system reset unless otherwise stated in the relevant text.

Unless otherwise stated in the relevant text, all registers support read and write accesses. A write updates the contents of the register and a read returns the contents of the register.

All registers defined in this document can only be accessed using word reads and word writes, unless otherwise stated in the relevant text.