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EP9301 Scheda tecnica(PDF) 21 Page - Cirrus Logic

Il numero della parte EP9301
Spiegazioni elettronici  Entry-level ARM9 System-on-chip Processor
PDF  41 Pages
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Produttore elettronici  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

EP9301 Scheda tecnica(HTML) 21 Page - Cirrus Logic

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21
EP9301
Entry Level ARM9 System-on-Chip Processor
Static Memory 32-bit Write on 16-bit External Bus
Parameter
Symbol
Min
Typ
Max
Unit
AD setup to WRn assert time
tADs
tHCLK – 3
-
-ns
WRn/DQMn deassert to AD transition time
tADd
-
-tHCLK + 6
ns
AD hold from WRn deassert time
tADh
tHCLK × 2
-
-ns
CSn hold from WRn deassert time
tCSh
7
-
-ns
CSn to WRn assert delay time
tWRd
--
2
ns
WRn assert time
tWRpwL
-
tHCLK × (WST1 + 1)
-ns
WRn deassert time
tWRpwH
--
(tHCLK × 2) + 14
ns
CSn to DQMn assert delay time
tDQMd
--
1
ns
DQMn assert time
tDQMpwL
-
tHCLK × (WST1 + 1)
-ns
DQMn deassert time
tDQMpwH
--
(tHCLK × 2) + 7
ns
WRn / DQMn deassert to DA transition time
tDAh1
tHCLK
-
-ns
WRn / DQMn assert to DA valid time
tDAV
--
8ns
Figure 9. Static Memory Multiple Word Write 16-bit Cycle Timing Measurement
CSn
WRn
RDn
DQMn
AD
DA
t
ADs
t
WRd
t
WRpwL
t
DAh
t
ADd
t
WRpwH
t
DQMd
t
ADh
t
DAh
t
WRpwL
t
DQpwL
t
DQpwH
t
DQpwL
WAIT
t
CSh
t
DAV
t
DAV



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