37.14.1 Restriction

When one of the EXNW_MODE is enabled, at least one hold cycle must be programmed for the read/write controlling signal. For that reason, the NWAIT signal cannot be used in Slow Clock mode (see Slow Clock Mode).

The NWAIT signal is assumed to be a response of the external device to the read/write request of the SMC. NWAIT is then examined by the SMC in the Pulse state of the read or write controlling signal. The assertion of the NWAIT signal outside the expected period has no impact on the SMC behavior.