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CY7C1471V25
CY7C1473V25
CY7C1475V25
Document #: 38-05287 Rev. *I Page 24 of 32
Switching Waveforms
Figure1 shows re ad-write timing waveform.[19, 20, 21]
Figure 1. Read/Write Timing
WRITE
D(A1)
123456789CLKtCYC
tCL
tCH
10CEtCEH
tCES
WECENtCENH
tCENS
BWX
ADV/LDtAH
tAS
ADDRESS A1 A2 A3 A4 A5 A6 A7tDH
tDS
DQCOMMANDtCLZ
D(A1) D(A2) Q(A4)Q(A3)
D(A2+1)
tDOH tCHZ
tCDV
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
OEtOEV
tOELZ
tOEHZ
DON’T CARE UNDEFINEDD(A5)
tDOH
Q(A4+1)
D(A7)Q(A6)
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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