IS43R16800A-6T ISSI [Integrated Silicon Solution, Inc], IS43R16800A-6T Datasheet - Page 37

• Manufacturer Part Number: IS43R16800A-6T
• Description: 8Meg x 16 128-MBIT DDR SDRAM
• Manufacturer: ISSI [Integrated Silicon Solution, Inc]

IS43R16800A-6
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev. 00A
04/04/06
A Write command to the consecutive Precharge command interval (same bank)
The minimum interval tWPD is necessary between the write command and the precharge command.
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.
Command
Command
DQS
DQS
/CK
/CK
DM
DM
DQ
DQ
CK
CK
WRIT
WRIT
t0
t0
WRITE to PRECHARGE Command Interval (same bank) (BL = 4)
Precharge Termination in Write Cycles (same bank) (BL = 4)
in0
in0
t1
t1
in1
in1
Last data input
Data masked
NOP
in2
in2
t2
t2
tWPD
NOP
in3
in3
tWR
t3
t3
PRE/PALL
tWR
t4
t4
PRE/PALL
t5
t5
t6
t6
NOP
NOP
t7
t7
ISSI
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