AS4C64M8D2
Figure 19. Burst read operation: RL=5 (AL=2, CL=3, BL=4)
T0
T1
T2
T3
T4
T5
T6
T7
T8
CK#
CK
Posted CAS#
READ A
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
CMD
=< tDQSCK
DQS
DQS#
AL=2
CL=3
RL=5
Dout A0 Dout A1 Dout A2
Dout A3
DQs
Figure 20. Burst read operation: RL=3 (AL=0, CL=3, BL=8)
T0
T1
T2
T3
T4
T5
T6
T7
T8
CK#
CK
READ A
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
CMD
=< tDQSCK
DQS
DQS#
CL=3
RL=3
Dout A0 Dout A1 Dout A2
Dout A3 Dout A4 Dout A5 Dout A6
Dout A7
DQs
Figure 21. Burst read followed by burst write: RL=5, WL= (RL-1) =4, BL=4
T0
T1
Tn-1
Tn
Tn+1
Tn+2
Tn+3
Tn+4
Tn+5
CK#
CK
Post CAS#
READ A
Post CAS#
WRITE A
NOP
NOP
NOP
NOP
NOP
NOP
NOP
CMD
tRTW (Read to Write turn around time)
DQS
DQS#
RL=5
WL = RL-1 = 4
Dout A0 Dout A1 Dout A2 Dout A3
Din A0
Din A1
Din A2
Din A3
DQs
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.
Confidential
39
Rev. 1.0
Feb. /2014
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
