MT40A512M16JY-083E Datasheet, PDF (344/358 Pages) Micron Technology – Automotive DDR4 SDRAM

Table 157: Electrical Characteristics and AC Timing Parameters (Continued)
Parameter
Write leveling hold from rising DQS_t,
DQS_c crossing to rising CK_t, CK_c cross-
ing
Write leveling output delay
Write leveling output error
Exit reset from CKE HIGH to a valid MRS
gear-down
CKE HIGH assert to gear-down enable
time)
MRS command to sync pulse time
Sync pulse to first valid command
Gear-down setup time
Gear-down hold time
Symbol
t_WLH
DDR4-1600
Min Max
0.13
–
DDR4-1866
Min Max
0.13
–
DDR4-2133
Min Max
0.13
–
t_WLO
0
9.5
0
9.5
0
9.5
t_WLOE
0
2
0
2
0
2
Gear-Down Timing (Not Supported Below DDR4-2666)
t_{XPR_GEAR}
N/A
N/A
N/A
t_{XS_GEAR}
N/A
N/A
N/A
t_{SYNC_GEAR}
t_{CMD_GEAR}
t_{GEAR_setup}
t_{GEAR_hold}
N/A
N/A
N/A
–
N/A
–
N/A
N/A
N/A
–
N/A
–
N/A
N/A
N/A
–
N/A
–
DDR4-2400
Min Max
0.13
–
Unit
CK(AV
G)
Notes
0
9.5
ns
0
2
ns
N/A
CK
N/A
CK
N/A
CK
N/A
CK
N/A
–
CK
N/A
–
CK