EDS2532EGBH-TT
Power-up sequence
Power-up sequence
1. Apply VDD and VDDQ at the same time. Keep CKE low during power up.
2. Wait for stable power.
3. Start clock and drive CKE high.
Note: Voltage on any input pin must not exceed VDD + 0.3V during power up.
Initialization sequence
4. After stable power and stable clock, wait 200µs.
5. Issue precharge all command (PALL).
6. After tRP delay, issue 8 or more auto-refresh commands (REF).
7. Issue the mode register set command (MRS) to program the mode register.
If necessary, issue the extended mode register set command (EMRS) to change the default value of extended
mode register after lMRD of the MRS command.
Note: We recommend that you keep DQM and CKE high during initialization sequence to prevent data contention
on the DQ bus.
Power up sequence
Initialization sequence
0V
VDD, VDDQ
CKE
Low
CLK
lRP
lRC
lRC
lMRD
Command
PALL
REF
REF
MRS
CMD
Power stable
Clock stable
Power-up sequence and Initialization sequence
Preliminary Data Sheet E1200E40 (Ver. 4.0)
24
ELPIDA [ ELPIDA MEMORY ]
