Datasheet

Power Down Entry and Exit timing during Command/Address Parity Mode is Enable
Power Down entry and exit timing during Command/Address Parity mode is enable shown below.
CK#
T1 T2 Ta0 Ta1 Tb1T0
CK
CKE
DESVALID DES
t
IH
t
CPDED
DON'T CARETIME BREAK
DES
VALID
ADDR
CMD
Tb2 Tc0
DES DES
t
IS
t
IH
t
IS
t
XP_PAR
DES
DES VALID VALID
Tc1 Tc2 Tc3 Tc4
VALID VALID
ODT
2
t
PD
DES
NOTE 1 VALID command at T0 is ACT, DES or Precharge with still one bank remaining open after completion of the precharge command.
NOTE 2 ODT pin driven to a valid state, MR5[A5 = 0] (default setting) is shown
NOTE 3 CA Parity = Enable
Figure 38. Power-Down Entry and Exit Timing with C/A Parity
Table 22. AC Timing Table
Symbol
Parameter
Min.
Max.
Unit
t
XP_PAR
Exit Power Down with DLL on to any valid command; Exit
Precharge Power Down with DLL frozen to commands not
requiring a locked DLL when CA Parity is enabled
max (4nCK,6ns) + PL
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AS4C256M16D4
Confidential
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Rev.1.0 Aug.2019