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CY7C1460AV25
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Document #: 38-05354 Rev. *D Page 20 of 27
Switching Waveforms
Read/Write/Timing
[23, 24, 25]
NOP, STALL and DESELECT Cycles
[23, 24, 26]
Notes:
23.For this waveform ZZ is tied low.
24.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.
25.Order of the Burst sequence is determined by the status of the MODE (0=Linear, 1=Interleaved).Burst operations are optional.
26.The IGNORE CLOCK EDGE or STALL cycle (Clock 3) illustrated CEN
being used to create a pause. A write is not performed during this cycle.
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)
READ
Q(A3)
45678910
CLK
CE
WE
CEN
BWx
ADV/LD
ADDRESS
A3 A4
A5
D(A4)
Data
In-Out (DQ)
A1
Q(A5)
WRITE
D(A4)
STALLWRITE
D(A1)
123
READ
Q(A2)
STALL NOP READ
Q(A5)
DESELECT CONTINUE
DESELECT
DON’T CARE UNDEFINED
t
CHZ
A2
D(A1) Q(A2) Q(A3)
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