Preliminary
VG37648041AT
256M:x4, x8, x16
VIS
CMOS Synchronous Dynamic RAM
POWER-DOWN MODE
t
t
t
CK
CL
CH
CLK#
CLK
t
t
t
t
IS
IS
IH
IS
CKE
t
t
IH
IS
COMMAND
VALID
VALID
VALID*
t
NOP
t
IH
IS
VALID
ADDR
DQS
DQ
DM
Enter
Power-Down
Mode
Exit
Power-Down
Mode
DONT’ CARE
UNDEFINED
No column accesses are allowed to be in progress at the time Power-Down in entered
*= If this command is a PRECHARGE (or if the device is already in the idle state) then the Power-Down
mode shown is Precharge Power Down. If this command is an ACTIVE (or if at lease one row is already
active) then the Power-Down mode shown is Active Power Down.
Document : 1G5-0157
Rev.1
Page77