JPS6455652A - Data processor - Google Patents

Abstract

PURPOSE:To efficiently perform the debugging processing, by controlling the initialization of a storage means in which information required for debugging processing is stored by select information set and supplied independently of a reset signal. CONSTITUTION:When the reset signal is given to a gate circuit 7, to which mask information M1-Mn indicating that initialization of debugging registers R1-Rn is inhibited are given, from the external through a reset terminal 3, an initializing signal is not given to corresponding debugging registers R1-Rn from the gate circuit 7; but when the reset signal is given to the gate circuit 7, to which mask information M1-Mn indicating that initialization of debugging registers R1-Rn is permitted are given, from the external through the reset terminal 3, the initializing signal is given to corresponding debugging registers R1-Rn from the gate circuit 7. Thus, the initialization of debugging registers due to the reset signal is inhibited to efficiently perform the debugging processing.