AS7C251MNTD32A
AS7C251MNTD36A
®
Timing waveform of read/write cycle
tCH tCL
tCYC
CLK
tCENS
tCENH
CEN
CE1
tCSS
tCSH
CE0, CE2
tADVS
tADVH
ADV/LD
R/W
tWS
tWH
tWS
tWH
BWn
tAS
tAH
A7
A3
A4
A5
A6
A1
A2
ADDRESS
tCD
tLZC
tDS tDH
tOH
tOE
tHZC
D(A5)
Q(A6)
D/Q
OE
D(A1)
D(A2)
Q(A3)
Q(A4)
Q(A4
Ý
01)
D(A2Ý01)
tHZOE
tLZOE
Burst
Write
D(A2Ý01)
Write
D(A1)
Burst
Read
Q(A4Ý01)
Read
Q(A3)
DSEL
Write
D(A2)
Write
D(A5)
Read
Q(A6)
Write
D(A7)
Read
Q(A4)
Command
Note: Ý = XOR when LBO = high/no connect. Ý = ADD when LBO = low. BW[a:d] is don’t care.
1/17/05, V 1.2
Alliance Semiconductor
P. 12 of 18