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CONFIDENTIAL – DO NOT COPY
Page 8-11
File No. SG-0184
Command Truth Table
1. Power-Up and Initialization Sequence
The following sequence is required for POWER UP and Initialization.
1. Apply power and attempt to maintain CKE at a low state (all other inputs may be undefined.)
- Apply VDD before or at the same time as VDDQ.
- Apply VDDQ before or at the same time as VTT & VREF).
2. Start clock and maintain stable condition for a minimum of 200us.
3. The minimum of 200us after stable power and clock (CLK, CLK), apply NOP & take CKE
high.
4. Issue precharge commands for all banks of the device.
5. Issue EMRS to enable DLL. (To issue “DLL Enable” command, provide “Low” to A0, “High”
to BA0 and “Low” to all of the rest address pins, A1~A11 and BA1)