22.3.3 Control Communication

Control communication is built from multiple SCD communications. Each time an SCD is sent, there are bits that are stored. Once enough bits are stored, then a full control communication is formed. The addition of a control frame allows the ability to read and write to client registers and also send commands to addresses or all clients. To create this control frame, each CDM and CDS bit from the BiSS frames are combined to create a control “packet.” To initiate a control frame, 14 zeroes must be transmitted by the host as the CDM. Because of this, each control communication has SCD communication, which means to setup control communication, the SCD communication still must be set up. In this case, the setup for sensor communication outlined above can be used, and then the control communication for reading and writing to registers can be focused on next.