CY7C1470BV33
CY7C1472BV33, CY7C1474BV33
Document #: 001-15031 Rev. *C Page 23 of 30
Switching Waveforms

Figure 5 shows read-write timing waveform.[20, 21, 22]

Figure 5. Read/Write Timing

WRITE
D(A1)

123456789

CLK

tCYC
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)
Notes
20.For this waveform ZZ is tied LOW.
21.When CE is LOW, CE1 is LOW, CE2 is HIGH, and CE3 is LOW. When CE is HIGH, CE1 is HIGH, CE2 is LOW or CE3 is HIGH.
22.Order of the Burst sequence is determined by the status of the MODE (0 = Linear, 1= Interleaved). Burst operations are optional.
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