EtronTech
EM68916CWQA
Figure 31.2. Burst write followed by precharge: WL= (RL-1) =4
T0
T1
T2
T3
T4
T5
T6
T7
T9
CK#
CK
Post CAS#
Write A
Precharge A
NOP
NOP
NOP
NOP
NOP
NOP
NOP
CMD
Completion of the Burst Write
>=tWR
DQS
DQS#
WL= 4
DNA0 DNA1 DNA2 DNA3
DQ's
Figure 32.1. Burst read operation with auto precharge:
(RL=4,AL=1, CL=3, BL=8, tRTP≦2 clocks)
T0
T1
T2
T3
T4
T5
T6
T7
T8
CK#
CK
Bank A
Activate
Post CAS#
READ A
NOP
NOP
AL + BL/2 clks
CL = 3
NOP
NOP
NOP
NOP
>= tRP
NOP
CMD
DQS
Autoprecharge
DQS#
AL = 1
RL= 4
DQ's
DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT
A0 A1 A2 A3 A4 A5 A6 A8
>=tRTP
tRTP
First 4-bit prefetch
Second 4-bit prefetch
Precharge begins here
Etron Confidential
50
Rev. 1.1
Apr. 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
