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CY7C1317CV18, CY7C1917CV18
CY7C1319CV18, CY7C1321CV18
Document Number: 001-07161 Rev. *D Page 26 of 31
Switching Waveforms
Figure 5. Read/Write/Deselect Sequence
[27, 28, 29]
K
1
2
3
4
5
6
7
8
9
10
11 12
13
A
DQ
C
READ
(burst of 4)
READ
(burst of 4)
READ
(burst of 4)
NOP
NOP
WRITE
(burst of 4)
WRITE
(burst of 4)
NOP
DON’T CARE
UNDEFINED
CQ
K
LD
R/W
C
CQ
t
KH
t
KL
t
CYC
t
KHKH
t
SC
t
HC
t
SA
t
HA
A0 A1
A2
A3
A4
Q00 Q01 Q02 Q03 Q10 Q11 Q12 Q13 D20 D21 D22 D23 D30 D31 D32 D33
t
HD
t
SD
t
HD
t
SD
t
KHCH
t
KHCH
t
CLZ
t
DOH
t
CO
t
CQD
t
CQDOH
t
CHZ
t
CCQO
t
KH
t
KL
t
CYC
t
KHKH
t
CQOH
t
CCQO
t
CQOH
t
CQHCQH
t
CQH
Q40
Notes
27.Q00 refers to output from address A0. Q01 refers to output from the next internal burst address following A0, that is, A0 + 1.
28.Outputs are disabled (High-Z) one clock cycle after a NOP.
29.In this example, if address A4 = A3, then data Q40 = D30, Q41 = D31, Q42 = D32, and Q43 = D43. Write data is forwarded immediately as read results. This note
applies to the whole diagram.
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