| 摘要 |
A method of monitoring abnormality of a clock driver in an electronic apparatus having a clock supply unit that supplies a clock signal CLa to at least one function executing unit, each function executing unit having a clock driver 11 which, on the basis of the input clock signal CLa, oscillates internally to produce an output clock signal CLb. Each function executing unit includes monitoring means which monitors the input clock signal CLa and the output clock signal CLb of the clock driver 11, and generates an alarm upon judging that the clock drive is functioning abnormally. The monitoring means can respond to the output signal being cut off whilst the input signal is not (Fig. 1A) or to an excessive phase difference between the input and output (Fig. 1B). <IMAGE> |
