FIELD: control units for internal combustion engines. SUBSTANCE: device has central processing unit, nonvolatile memory unit, volatile memory unit, testing circuit, data input-output unit, units for suppression of testing signals. Microcomputer operates in two modes: execution of program which is stored in nonvolatile memory unit, and execution of program which is stored in volatile memory unit. EFFECT: separation of execution of programs which are stored in nonvolatile or volatile memory units. 6 cl, 6 dwg
