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Is correct operation guaranteed in changing clock during operation ?

Latest Updated:03/18/2009

Question:

Is correct operation guaranteed when changing system clock frequency during device operation ?

Answer:

Correct operation is NOT guaranteed when changing system clock frequency during device operation. Waveforms of the clock may deform and internal logic may fail to function correctly when changing the clock. The following methods are possible to change clock frequency: 1) Change MD2 and MD3 pin setting via external circuit and reset. (Changing clock mode) 2) Set the SH7044 into standby mode and change the clock (external circuit not required).  However these are only theoretical and should be fully tested before applying to your system.
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