NTC Proprietary
Level: Property
DDR3(L)-2Gb SDRAM
NT5CB(C)256M8JQ/NT5CB(C)128M16JR
DLL Switch Sequence from DLL-on to DLL-off
T
a
T
a
T
b
T
c
T
d
T
d
T
e
T
e
T
f
T0
T1
0
1
0
0
0
1
0
1
0
CK
CK
tMOD
NOP
tCKSRE
NOP
4)
tCKSRX 5)
SRX 6)
tXS
tMOD
NOP
Vali
d
CMD
CKE
MRS 2)
SRE 3)
MRS 7)
8)
8)
1)
NOP
tCKESR
Vali
d
Vali
d
ODT
8)
Do
Tim
not
Car
e
e
break
Note:
ODT: Static LOW in case RTT_Nom and RTT_WR is enabled, otherwise static Low or High
1) Starting with Idle State, RTT in Hi-Z State.
2) Disable DLL by setting MR1 Bit A0 to 1.
3) Enter SR.
4) Change Frequency.
5) Clock must be stable at least tCKSRX.
6) Exit SR.
7) Update Mode registers with DLL off parameters setting.
8) Any valid command.
Version 1.4
05/2019
34
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