MT40A512M16JY-083E Datasheet, PDF (356/358 Pages) Micron Technology – Automotive DDR4 SDRAM

Table 158: 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
Symbol
t_WLH
t_WLO
t_WLOE
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
t_{XPR_GEAR}
t_{XS_GEAR}
t_{SYNC_GEAR}
t_{CMD_GEAR}
t_{GEAR_setup}
t_{GEAR_hold}
DDR4-2666
Min Max
0.13
–
DDR4-2933
Min Max
0.13
–
0
9.5
0
9.5
0
2
0
2
Gear-Down Timing
t_XPR
t_XPR
t_XS
t_XS
t_{MOD + 4CK}
t_MOD
2CK
–
2CK
–
t_{MOD + 4CK}
t_MOD
2CK
–
2CK
–
DDR4-3200
Min Max
0.13
–
0
9.5
0
2
t_XPR
t_XS
t_{MOD + 4CK}
t_MOD
2CK
–
2CK
–
Reserved
Min Max
Unit Notes
CK
ns
ns
CK
CK
CK
CK
CK
CK