EP9301 Datasheet, PDF (19/41 Pages) Cirrus Logic – Entry-level ARM9 System-on-chip Processor

Static Memory 32-bit Write on 8-bit External Bus
Parameter
AD setup to WRn assert time
WRn/DQMn deassert to AD transition time
AD hold from WRn deassert time
CSn hold from WRn deassert time
CSn to WRn assert delay time
WRn assert time
WRn deassert time
CSn to DQMn assert delay time
DQMn assert time
DQMn deassert time
WRn / DQMn deassert to DA transition time
WRn / DQMn assert to DA valid time
Symbol
t_ADs
t_ADd
t_ADh
t_CSh
t_WRd
t_WRpwL
t_WRpwH
t_DQMd
t_DQMpwL
t_DQMpwH
t_DAh
t_DAV
EP9301
Entry Level ARM9 System-on-Chip Processor
Min
t_HCLK − 3
-
t_HCLK × 2
7
-
-
-
-
-
-
t_HCLK
-
Typ
-
-
-
-
-
t_HCLK × (WST1 + 1)
t_HCLK × 2
-
t_HCLK × (WST1 + 1)
-
-
-
Max
Unit
-
ns
t_HCLK + 6
ns
-
ns
-
ns
2
ns
-
ns
(t_HCLK × 2) + 14 ns
1
ns
-
ns
(t_HCLK × 2) + 7
ns
-
ns
8
ns
t_ADs
AD
t_ADd
t_ADd
t_ADd
t_ADh
CSn
WRn
t_WRd
RDn
t_DQMd
DQMn
DA
WAIT
t_WRpwL
t_WRpwL
t_WRpwL
t_WRpwH
t_WRpwH
t_WRpwH
t_CSh
t_DQMpwL
t_DQMpwL
t_DQMpwL
t_DAV
t_DQMpwH
t_DAV
t_DQMpwH
t_DAV
t_DQMpwH
t_DAV
t_DAh
t_DAh
t_DAh
t_DAh
Figure 7. Static Memory Multiple Word Write 8-bit Cycle Timing Measurement
DS636PP5
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