IS43R16320B
IC43R16320B
A Write command to the consecutive Read command interval: To complete the burst operation
Destination row of the consecutive read
command
Bank
address
Row address State
Operation
To complete the burst operation, the consecutive read command should be
performed tWRD (= 1 + BL/2 + tWTR) after the write command.
1. Same
Same
Different
Any
ACTIVE
Precharge the bank tWPD after the preceding write command. tRP after the
precharge command, issue the ACT command. tRCD after the ACT command, the
consecutive read command can be issued. See ‘A read command to the
consecutive precharge interval’ section.
2. Same
—
To complete a burst operation, the consecutive read command should be
performed tWRD (= 1 + BL/2 + tWTR) after the write command.
3. Different
ACTIVE
IDLE
Precharge the bank independently of the preceding write operation. tRP after the
precharge command, issue the ACT command. tRCD after the ACT command, the
consecutive read command can be issued.
t0
t1
t2
t3
t4
t5
t6
t7
t8
CK
/CK
Command
WRIT
NOP
READ
NOP
tWRD (min)
1 + BL/2 + tWTR cycles
tWTR*
DM
out2
DQ
out0 out1
in0
in1
in2
in3
DQS
INPUT
OUTPUT
BL = 4
CL = 3
Note: tWTR is referenced from the first positive CK edge after the last desired data in pair tWTR.
WRITE to READ Command Interval
34
Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00B
06/11/08
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
