| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a register monitor circuit for preventing device malfunction when the content of a register changes due to bit change or abnormal writing. <P>SOLUTION: A register 2 for monitor is installed in a target register 1 for duplicating a system. Also, clock signals CLK1 and CLK2 to be supplied to the register 2 for monitor with the same frequency and in different timings are used for the object register 1. Thus, it is possible to detect that the registers 1 and 2 are rewritten as an alarm signal(ALARM), and to provide a response even when the registers 1 and 2 are rewritten due to the superimposition of a noise on the clock signals. <P>COPYRIGHT: (C)2007,JPO&INPIT |
