EDD5104ABTA, EDD5108ABTA
A Write command to the consecutive Precharge command interval (same bank)
The minimum interval tWPD ((BL/2 + 3 for tCK = 7.5 ns, BL/2 + 4 for tCK = 6 ns) cycles) is necessary between the
write command and the precharge command.
t0
t1
t2
t3
t4
t5
t6
t7
CK
/CK
Command
WRIT
NOP
tWPD
PRE/PALL
tWR
NOP
DM
;;;;;DQS
DQ
in0 in1 in2 in3
Last data input
WRITE to PRECHARGE Command Interval (same bank) (BL = 4)
Precharge Termination in Write Cycles
During a burst write cycle without auto precharge, the burst write operation is terminated by a precharge command
of the same bank. In order to write the last input data, tWR (min) must be satisfied. When the precharge command
is issued, the invalid data must be masked by DM.
t0
t1
t2
t3
t4
t5
t6
t7
CK
/CK
Command
WRIT
NOP
PRE/PALL
NOP
;;;;tWR
DM
DQS
DQ
in0 in1 in2 in3
Data masked
Precharge Termination in Write Cycles (same bank) (BL = 4)
Preliminary Data Sheet E0237E30 (Ver. 3.0)
;38