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