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Document #: 38-05290 Rev. *I Page 20 of 28
Switching Waveforms
Read/Write/Timing
[21, 22, 23]
Notes:
21.For this waveform ZZ is tied LOW.
22.When CE
is LOW, CE
1
is LOW, CE
2
is HIGH and CE
3
is LOW. When CE is HIGH,CE
1
is HIGH or CE
2
is LOW or CE
3
is HIGH.
23.Order of the Burst sequence is determined by the status of the MODE (0 = Linear, 1 = Interleaved).Burst operations are optional.
WRITE
D(A1)
123456789
CLK
t
CYC
t
CL
t
CH
10
CE
t
CEH
t
CES
WE
CEN
t
CENH
t
CENS
BW
x
ADV/LD
t
AH
t
AS
ADDRESS
A1 A2
A3
A4
A5 A6 A7
t
DH
t
DS
Data
I
n-Out (DQ)
t
CLZ
D(A1) D(A2) D(A5)Q(A4)Q(A3)
D(A2+1)
t
DOH
t
CHZ
t
CO
WRITE
D(A2)
BURST
WRITE
D(A2+1)
READ
Q(A3)
READ
Q(A4)
BURST
READ
Q(A4+1)
WRITE
D(A5)
READ
Q(A6)
WRITE
D(A7)
DESELECT
OE
t
OEV
t
OELZ
t
OEHZ
t
DOH
DON’T CARE UNDEFINED
Q(A6)
Q(A4+1)
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