Cypress CY7C1470BV25, CY7C1472BV25, CY7C1474BV25 Switching Waveforms

CY7C1470BV25
CY7C1472BV25, CY7C1474BV25
Document #: 001-15032 Rev. *D Page 22 of 29
Switching Waveforms
Figure 6 shows read-write timing waveform.[19, 20, 21]
Figure 6. 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
19.For this waveform ZZ is tied LOW.
20.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.
21.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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