The BIM M13x series of bus interface modules is based on the NEC78K0/Kx2 microcontroller family providing state of the art flash technology. This enables the application designer to utilize a modern tool chain including debug tools leading to shorter development times. In addition the BIM M13x series is designed with a high degree of hardware compatibility to BIM M111/115 and BIM M113 enabling to replace the BIM M111/113/115 in existing hardware and in most cases reducing the development effort to the application software. As in BIM M111/113/115 the application interface includes the PEI,Reset,two PWMs and one processor port. The BIM M13x modules contain the BCU 2.5 system software compliant to the KNX specification.