AS4C64M8D2 datasheet(39/59 Pages) ALSC

39 / 59 page

AS4C64M8D2

Confidential

Rev. 1.0

Feb. /2014

Figure 19. Burst read operation: RL=5 (AL=2, CL=3, BL=4)

CK#

DQs

CMD

DQS

Posted CAS#

READ A

NOP

=< tDQSCK

Dout A0 Dout A1 Dout A2 Dout A3

AL=2

CL=3

RL=5

DQS#

Figure 20. Burst read operation: RL=3 (AL=0, CL=3, BL=8)

CK#

DQs

CMD

DQS

READ A

NOP

Dout A0 Dout A1 Dout A2 Dout A3

CL=3

RL=3

DQS#

=< tDQSCK

Dout A4 Dout A5 Dout A6 Dout A7

Figure 21. Burst read followed by burst write: RL=5, WL= (RL-1) =4, BL=4

CK#

DQs

CMD

DQS

Tn-1

Tn+1

Tn+2

Tn+3

Tn+4

Tn+5

Post CAS#

READ A

NOP

Post CAS#

WRITE A

NOP

Dout A0

RL=5

DQS#

tRTW (Read to Write turn around time)

WL = RL-1 = 4

Dout A1

Dout A2

Dout A3

Din A0

Din A1

Din A2

Din A3

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.

AS4C64M8D2 Datasheet(PDF) 39 Page - Alliance Semiconductor Corporation

AS4C64M8D2 Datasheet(HTML) 39 Page - Alliance Semiconductor Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

Datasheet Download

Link URL