The present invention relates to a method (50) for controlling an integrated circuit (20) comprising a microprocessor, in which the integrated circuit (20) is configured to execute by default a general program, said integrated circuit being controlled by activation of a mode of operation of the integrated circuit, called “bootstrap mode”, in which said integrated circuit (20) executes a program for loading a specific program to be executed. The method (50) comprises: i) a step (51) of sending at least one bootstrap mode activation message to a test module (200) of the integrated circuit (20) via a test bus (310), ii) a step (52) of activating the bootstrap mode of the integrated circuit (20), executed by the test module (200) of the integrated circuit (20), and iii) a step (53) of loading the specific program via a communication bus (320) different from the test bus (310). The present invention also relates to an integrated circuit (20) and a computer (30) including such an integrated circuit (20).