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operation, provided that VREFDQ is valid and stable prior to CKE going back high and that first write operation

or first write Leveling activity may not occur earlier than 512 nCK after exit from Self Refresh.

Note17.

If all banks are closed at the conclusion of the read, write or precharge command, then Precharge

Power-Down is entered, otherwise Active Power-Down is entered.

Note18.

‘Idle state’ is defined as all banks are closed (tRP, tDAL, etc. satisfied), no data bursts are in progress,

CKE is high, and all timings from previous operations are satisfied (tMRD, tMOD, tRFC, tZQinit, tZQoper,

tZQCS, etc.) as well as all self-refresh exit and power-down exit parameters are satisfied (tXS, tXP, tXPDLL,

etc).