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CY7C1663KV18 データシート(PDF) 25 Page - Cypress Semiconductor

部品番号 CY7C1663KV18
部品情報  144-Mbit QDR짰 II SRAM Four-Word Burst Architecture (2.5 Cycle Read Latency)
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メーカー  CYPRESS [Cypress Semiconductor]
ホームページ  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C1663KV18 データシート(HTML) 25 Page - Cypress Semiconductor

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Document Number: 001-44060 Rev. *O
Page 25 of 31
CY7C1663KV18/CY7C1665KV18
Switching Waveforms
Read/Write/Deselect Sequence
Figure 6. Waveform for 2.5 Cycle Read Latency [40, 41, 42]
tKH
tKL
tCYC
tKHKH
t
t
t
tSA
HA
SC
HC
tHD
tSC tHC
A0
A1
A2
A3
t
t
SD
HD
t SD
D11
D10
D12
D13
D30
D31
D32
D33
D
A
WPS
RPS
K
K
t
NOP
READ
NOP
WRITE
READ
WRITE
1
23
4
56
7
8
CQ
CQ
Q
tCQOH
CCQO
t
CLZ
t
t
CO
tDOH
tCQDOH
CQD
t
tCHZ
tCQOH
CCQO
t
tQVLD
QVLD
QVLD
DON’T CARE
UNDEFINED
(Read Latency = 2.5 Cycles)
Q00
Q01
Q20
Q02
Q21
Q03
Q22
Q23
tCQH
tCQHCQH
Notes
40. Q00 refers to output from address A0. Q01 refers to output from the next internal burst address following A0, that is, A0 + 1.
41. Outputs are disabled (High Z) one clock cycle after a NOP.
42. In this example, if address A2 = A1, then data Q20 = D10, Q21 = D11, Q22 = D12, and Q23 = D13. Write data is forwarded immediately as read results. This note
applies to the whole diagram.


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