Cypress CY7C1568V18 Manual De Usuario
CY7C1566V18, CY7C1577V18
CY7C1568V18, CY7C1570V18
CY7C1568V18, CY7C1570V18
Document Number: 001-06551 Rev. *E
Page 24 of 28
Switching Waveforms
Read/Write/Deselect Sequence
Figure 5. Waveform for 2.5 Cycle Read Latency
1
2
3
4
5
6
7
8
9
10
READ
READ
NOP
WRITE
WRITE
t
NOP
11
LD
R/W
A
tKH tKL
tCYC
tHC
tSA tHA
DON’T CARE
UNDEFINED
SC
A0
A1
A2
A3
A4
CQ
CQ
K
QVLD
t
NOP
NOP
DQ
K
tCCQO
tCQOH
tCCQO
tCQOH
QVLD
t
QVLD
t
QVLD
t
KHKH
12
READ
(Read Latency = 2.5 Cycles)
NOP
NOP
tCLZ
tCHZ
CQDOH
Q00
Q11
Q01 Q10
tDOH
tCO
Q40
tSD
HD
tSD
tHD
D20 D21
D30
D31
t
tCQD
t
tCQH
tCQHCQH
Notes
29. Q00 refers to output from address A0. Q01 refers to output from the next internal burst address following A0, that is, A0 + 1.
30. Outputs are disabled (High Z) one clock cycle after a NOP.
31. In this example, if address A4 = A3, then data Q40 = D30 and Q41 = D31. Write data is forwarded immediately as read results. This note applies to the whole diagram.
30. Outputs are disabled (High Z) one clock cycle after a NOP.
31. In this example, if address A4 = A3, then data Q40 = D30 and Q41 = D31. Write data is forwarded immediately as read results. This note applies to the whole diagram.