EtronTech
EM68916CWQA
Figure 30.1. Burst read operation followed by precharge:
(RL=4, AL=1, CL=3, BL=4, tRTP ≦2 clocks)
T0
T1
T2
T3
T4
T5
T6
T7
T8
CK#
CK
Bank A
Active
Post CAS#
Read A
Precharge
NOP
AL+BL'/2 clks
NOP
NOP
NOP
NOP
NOP
CMD
DQS
DQS#
AL=1
CL=3
>=tRP
RL=4
DQ
DOUTA0 DOUTA1 DOUTA2 DOUTA3
>=tRAS
>=tRTP
CL=3
Figure 30.2.Burst read operation followed by precharge:
(RL=4, AL=1, CL=3, BL=8, tRTP≦2 clocks)
T0
T1
T2
T3
T4
T5
T6
T7
T8
CK#
CK
Post CAS#
READ A
Precharge A
NOP
AL + BL/2 clks
NOP
NOP
NOP
NOP
NOP
NOP
CMD
DQS
DQS#
AL = 1
CL = 3
RL= 4
DQ's
DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT
A0 A1 A2 A3 A4 A5 A6 A8
>=tRTP
First 4-bit prefetch
Second 4-bit prefetch
Etron Confidential
47
Rev. 1.1
Apr. 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
