ELECTRONICS APPARATUS ABLE TO REVISE MICRO-PROGRAM AND ALGORITHM TO REVISE MICRO-PROGRAM

摘要

An electronic apparatus is disclosed, where the apparatus revises the micro-program thereof reliably. The apparatus provides a master and slave CPUs each having a memory. The micro-program to be revised is temporarily set in the memory of the slave CPU. Interrupting the master CPU, and connecting the slave CPU with the master CPU via an auxiliary interface independent of the inner interface (bus), the micro-program to be revised and stored in the memory of the slave CPU is transferred to the memory of the master CPU through the auxiliary interface. Auxiliary interface is cut during the normal operation of the master CPU.

主权项

1. An electronic apparatus, comprising:
a master central processing unit (CPU) configured to couple with a host system through an outer interface, the master CPU including a first memory; a slave CPU configured to couple with the master CPU through an inner interface, the secondary CPU including a second memory to store a data sent from a host system to the master CPU through the outer interface and transferred to the slave CPU through the inner interface; and a circuit element configured to couple with the slave CPU through an upstream auxiliary interface and the master CPU with a downstream auxiliary interface, the circuit element temporarily connecting the upstream auxiliary interface with the downstream auxiliary interface when the data stored in the second memory is transferred to the first memory.