Datasheet

Figure 23. Burst read followed by burst write: RL=5, WL= (RL-1) =4, BL=4
CK
CK#
DQs
CMD
DQS
T0 T1 Tn-1 Tn Tn+1 Tn+2 Tn+3 Tn+4 Tn+5
Post CAS#
READ A
NOP NOP
Post CAS#
WRITE A
NOP NOP NOP NOP NOP
Dout A
0
RL=5
DQS#
t
RTW
(Read to Write turn around time)
WL = RL-1 = 4
Dout A
1
Dout A
2
Dout A
3
Din A
0
Din A
1
Din A
2
Din A
3
NOTE : The minimum time from the burst read command to the burst write command is defined by a read-to-write-
turn-around-time, which is 4 clocks in case of BL = 4 operation, 6 clocks in case of BL = 8 operation.
Figure 24. Seamless burst read operation: RL=5, AL=2, CL=3, BL=4
CK
CK#
DQs
CMD
DQS
T0 T1 T2 T3 T4 T5 T6 T7 T8
Post CAS#
READ A
NOP
Post CAS#
READ B
NOP NOP NOP NOP NOP NOP
Dout A0
AL=2
DQS#
Dout A1 Dout A2 Dout A3
Dout B0
Dout B1 Dout B2
CL=3
RL=5
NOTE : The seamless burst read operation is supported by enabling a read command at every other clock for BL =
4 operation, and every 4 clock for BL =8 operation. This operation is allowed regardless of same or different banks
as long as the banks are activated.
AS4C64M16D2A-25BIN
AS4C64M16D2A-25BCN
Confidential
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Rev.1.1 October 2017