Cypress CY7C1527AV18 用户手册
CY7C1516AV18, CY7C1527AV18
CY7C1518AV18, CY7C1520AV18
CY7C1518AV18, CY7C1520AV18
Document Number: 001-06982 Rev. *D
Page 25 of 30
Switching Waveforms
Figure 5. Read/Write/Deselect Sequence
READ
READ
READ
NOP
NOP
WRITE
WRITE
NOP
1
2
3
4
5
6
7
8
9
10
Q40
t
KHCH
tCO
t
tHC
t
tHA
tSD
tHD
tKHCH
tSD
tHD
DON’T CARE
UNDEFINED
tCLZ
tDOH
tCHZ
SC
tKH
tKHKH
tKL
tCYC
A0
D20
D21
D30
D31
Q00
Q11
Q01
Q10
A1
A2
A3
A4
Q41
tCCQO
tCQOH
tCCQO
tCQOH
tKL
tCYC
K
K
LD
R/W
A
DQ
C
C#
CQ
CQ#
SA
tKH
tKHKH
tCQD
tCQDOH
tCQH
tCQHCQH
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 and Q41 = D31. Write data is forwarded immediately as read results. This note applies to the whole diagram.
28. Outputs are disabled (High-Z) one clock cycle after a NOP.
29. 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.