Patent ID: 8375250

Claim:
A method of testing a module comprising a bus interface, the method comprising: setting a module operating mode to a first mode, setting comprising configuring the bus interface to operate using a first bus interface protocol; wherein the first interface bus protocol comprises a maximum edge transition rate; after setting the module to the first operating mode, changing the operating mode from the first operating mode to a second operating mode, changing the operating mode from the first operating mode to the second operating mode comprising writing a first codeword to the bus interface, the first codeword different from a codeword used within the first bus interface protocol, wherein writing the first codeword to the bus interface comprises operating the bus interface at an edge transition rate exceeding the maximum edge transition rate of the first bus protocol, and configuring the bus interface to operate using a second bus interface protocol; and after changing the operating mode to the second operating mode, using the second bus interface protocol for performing tool access of software debug and hardware test infrastructure using the second bus protocol, the software debug and hardware test infrastructure being accessible during the second operating mode.