W632GU8KB Datasheet, PDF (29/160 Pages) Winbond – 32M X 8 BANKS X 8 BIT DDR3L SDRAM

W632GU8KB
Previous clock frequency
New clock frequency
CK#
CK
CKE
Command
T0
T1
T2
tCH
tCL
tCK
tIH
tIS
tCKSRE
tCKE
NOP
tCPDED
NOP
NOP
Ta0
Tb0
Tc0
Tc1
tCHb
tCLb
tCKb
tCKSRX
tIH
tIS
NOP
Td0
Td1
tCHb
tCLb
tCKb
NOP
MRS
Te0
Te1
tCHb
tCLb
tCKb
NOP
VALID
Address
ODT
tAOFPD / tAOF
DQS, DQS#
DQ
DM
High-Z
High-Z
Enter PRECHARGE
Power-Down Mode
Frequency
Change
DLL Reset
tXP
VALID
tIH
tIS
Exit PRECHARGE
Power-Down Mode
tDLLK
TIME BREAK
DON'T CARE
Notes:
1. Applicable for both SLOW EXIT and FAST EXIT Precharge Power-down.
2. tAOFPD and tAOF must be satisfied and outputs High-Z prior to T1; refer to ODT timing section for exact requirements.
3. If the Rtt_Nom feature was enabled in the mode register prior to entering Precharge power down mode, the ODT signal must
continuously be registered LOW ensuring RTT is in an off state, as shown in Figure 9. If the Rtt_Nom feature was disabled in
the mode register prior to entering Precharge power down mode, RTT will remain in the off state. The ODT signal can be
registered either LOW or HIGH in this case.
Figure 12 – Change Frequency during Precharge Power-down
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Publication Release Date: Jan. 20, 2015
Revision: A05