CB(CodeBlocks) is a c++ integrated compiler environment, and it is also a c/c++ recommended compiler for ACM/ICPC competition (programming competition for college students).

Control bus CB: used to transmit control signals and timing signals. Some control signals are sent by the microprocessor to the memory and I/O interface circuits, such as read/write signals, chip selection signals, interrupt response signals, etc. There are other components that feed back to the CPU, such as: interrupt application signal, reset signal, bus request signal, standby limit ready signal, etc. Therefore, the transmission direction of the control bus depends on the specific control signal, which is generally bidirectional, and the number of bits of the control bus depends on the actual control needs of the system. In fact, the specific situation of control bus mainly depends on CPU.

CB system (IEC Electrical Product Qualification Testing and Certification System) is an international system operated by IECEE. The certification bodies of IECEE member countries test the safety performance of electrical products based on IEC standards, and the test results, namely CB test report and CB test certificate, are mutually recognized among IECEE member countries. The purpose is to reduce the international trade barriers caused by the need to meet the certification or approval standards of different countries. IECEE is the abbreviation of the International Electrotechnical Commission's organization for conformity testing and certification of electrical products.