5.2 Programmable Clock Output (PCKx) Ready status issue

The Programmable Clock Output (PCKx) Ready status bit (PMC_SR.PCKRDYx) remains unexpectedly high when the PCKx source clock (PMC_PCKx.CSS) is changed on the fly while PCKx is already running.

Work Around

To change a PCKx source clock:

Disable PCKx (PMC_SCDR.PCKx).
Change the source clock (PMC_PCKx.CSS).
Re-enable PCKx (PMC_SCER.PCKx).
Wait for PCKRDYx to rise (PMC_SR.PCKRDYx).

Affected Device Revisions


A0	A0-D1G	A0-D2G	A1	A1-D1G	A1-D2G
X	X	X	X	X	X

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