BiSS Watchdog for RS422 with SPI
iC-MCW is a BiSS C communication monitoring device including RS422-receivers. With iC-MCW it is possible to implement any additional safety features to extend a standard BiSS drive for example. BiSS clock and BiSS data lines are connected to the iC-MCW. The BiSS sensor and control communication is observed and sampled at maximum transmission rates of 10 MBit/s. The end of a received BiSS frame triggers an interrupt request to notify the microcontroller about new BiSS communication status and frame data. The microcontroller is connected to the SPI interface of iC-MCW and imports the BiSS frame data without disrupting the transmission between BiSS master and BiSS slave. The internal frame counter and detailed status and error information are available. Due to built-in clock generation, the chip does not need any external oscillators.