AS7C251MPFS18A
®
Timing waveform of read/ write cycle
t
CYC
t
t
CL
CH
CLK
t
ADSPS
t
ADSPH
ADSP
t
AS
t
AH
A2
A3
A1
Address
t
WS
WH
t
GWE
CE0, CE2
CE1
t
ADVS
t
ADVH
ADV
OE
t
t
DS DH
D
D(A2)
IN
t
t
LZOE
CD
t
t
t
t
LZC
OH
OE
HZOE
D
OUT
Q(A1)
Q(A3)
Q(A3Ý01)
Q(A3Ý10)
Q(A3Ý11)
(pipelined mode)
t
CDF
D
Q(A3Ý11)
Q(A1)
Q(A3Ý01)
Q(A3Ý10)
OUT
(flow-through mode)
DSEL
Read
Q(A1)
Suspend
Read
Q(A1)
Read
Q(A2)
Suspend
Write
D(A )
Read
Q(A3)
ADV
Burst
Read
ADV
Burst
Read
ADV
Burst
Read
Suspend
Read
2
3Ý11
)
Q(A
3Ý01
3Ý10
3Ý11
Q(A )
D(A
)
Q(A
)
Note: Ý = XOR when LBO = high/ no connect; Ý = ADD when LBO = low.
12/ 2/ 02, v. 0.9.2 Advance Info
Alliance Semiconductor
18 of 21
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
