According to the characteristics of test data of the SOC rapid increasing

a test data compression scheme based on mixed compatible date blocks is presented.In the scheme

binary code is used to express the test data which are compatible with reference data

and eligible test data are compressed with one-bite compression

which are improved compression radio.The circuit structure of decoder with a finite state machine(FSM) and a cyclical scan register(CSR) was proposed.Experimental results show that...