Datasheet

Ta0 Ta1 Ta2 Tb0 Tb1 Tb2T0
MRS DESDES DES DES
NOTES:
1. MRS at Ta1 may or may not modify CAL, t
MOD_CAL
is computed based on new tCAL setting.
2. t
MOD_CAL
= t
MOD+tCAL
t
CAL
t
CAL
CK#
CK
CS#
Tc0
CMD
(w/o CS#)
VALID
t
MOD_CAL
Figure 18. t
MOD_CAL
, MRS to valid command timing with CAL enabled
Ta1 Ta2 Tb0 Tb1 Tb2 Tc0Ta0
MRS DES MRSDES DES DES
NOTES:
1. MRS command at Ta1 enables CAL mode
2. tMRD_CAL=tMOD+tCAL
t
CAL
t
MRD_CAL
CK#
CK
CMD
(w/o CS#)
CS#
Figure 19. CAL enabling MRS to next MRS command, t
MRD_CAL
Ta0 Ta1 Ta2 Tb0 Tb1 Tb2T0
MRS DESDES DES DES
NOTES:
1. MRS at Ta1 may or may not modify CAL, tMRD_CAL is computed based on new tCAL setting.
2. tMRD_CAL=tMOD+tCAL.
t
CAL
t
CAL
CK#
CK
CS#
Tc0
CMD
(w/o CS#)
MRS
t
MRD_CAL
Figure 20. t
MRD_CAL
, mode register cycle time with CAL enabled
AS4C512M8D4
Confidential
- 37 of 196 -
Rev.1.0. Aug.2019