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Can the parallel clock be applied before the CLC020 or CLC021 is powered up?

April 26, 2017applied clc020 clc021 clock parallel powered

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Can the parallel clock be applied before the CLC020 or CLC021 is powered up?

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No, unless the manual reset is used (CLC021 only). In the case of the CLC020, the parallel clock, PCLK, should not be asserted until at least 30µs after power-on. The same is true for the CLC021, unless the manual reset is used. If manual reset is used during power-on, then PCLK may be asserted at any time as long as manual reset is not de-asserted until the part is fully powered.