51.6.5.2 Software Requirements
Writing to the ISC_CTRLEN or ISC_CTRLDIS register requires a double domain synchronization, so it is forbidden to write these registers when ISC_CTRLSR.SIP is asserted.
Writing to the ISC_CTRLEN or ISC_CTRLDIS register requires a double domain synchronization, so it is forbidden to write these registers when ISC_CTRLSR.SIP is asserted.
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