AS4LC8M8S0
AS4LC4M16S0
®
Interleaved bank read waveform
(BL = 4, CL = 3, Autoprecharge)
CLK
CS
t
t
RC
RC
t
t
RC
RC
RAS
t
t
RAS
t
t
t
RP
RAS
RP
RAS
t
t
t
RAS
RAS
RP
CAS
WE
†
BA0/ BA1
Bank
Bank
RAa
Bank Bank
Bank
t
Bank
Bank
Bank
Bank
t
t
t
RCD
RCD
RCD
RCD
RA
d
A0–A9, A11
A10
RA
b
RA
RA
e
c
RA
RA
d
RA
a
CA
RA
a
CB
b
RA
e
CB
CB
c
c
d
b
DQM
CKE
t
t
t
t
RRD
RRD
RRD
RRD
DQ
QA QA QA QA
QB
b0
QB QB
QB
b3
QA QA QA QA
QB QB QB
b0 b1 b2
a0 a1 a2 a3
b1 b2
a0
a1
a2
a3
Active
Read
AP
Active
Bank A
Bank B
Read
Active
AP
Read
Active
AP
Active
Read
†
BA0 and BA1 together determine which bank undergoes operations. AP = internal precharge begins.
Interleaved bank read waveform
(BL = 8, CL = 3)
CLK
CS
t
t
RC
RC
t
RC
RAS
CAS
t
t
t
RAS
RAS
RP
t
t
t
RP
RP
RAS
WE
†
BA0/ BA1
Bank
RA
Bank Bank
Bank
Bank
Bank
Bank
Bank
CA
Bank
t
t
t
RCD
RCD
RCD
A10
RB
b
RA
c
a
A0–A9, A11
DQM
RB
b
RA
CB
b
RA
c
CA
a
a
c
CKE
DQ
QA
a0
QB
b4
QB
b5
QB
b6
QB
b7
QA
a1
QA QA QA
a2 a3 a4
QA QA
a5 a6
QB
b0
QB
b1
QA
c0
QA
c1
Precharge
Active
Read
Bank A
Bank B
Read
Active
Precharge
Active Read
Precharge
†
BA0 and BA1 together determine which bank undergoes operations.
7/ 5/ 00
ALLIANCE SEMICONDUCTOR
21
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
