ep9302 Cirrus Logic, Inc., ep9302 Datasheet - Page 19

• Manufacturer Part Number: ep9302
• Description: High-speed Arm9 System-on-chip Processor With Maverickcrunch
• Manufacturer: Cirrus Logic, Inc.

Static Memory 32-bit Write on 8-bit External Bus
DS653PP3
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
DQMn
WAIT
WRn
RDn
CSn
AD
DA
Parameter
t
ADs
t
DQMd
t
WRd
Figure 7. Static Memory Multiple Word Write 8-bit Cycle Timing Measurement
t
DAV
t
t
WRpwL
DQMpwL
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Copyright 2005 Cirrus Logic (All Rights Reserved)
t
t
WRpwH
DQMpwH
t
DAh
Symbol
t
t
t
ADd
t
DQMpwH
t
DQMpwL
WRpwH
t
WRpwL
t
DQMd
t
t
t
t
t
t
WRd
DAV
ADs
ADd
ADh
CSh
DAh
t
DAV
t
t
WRpwL
DQMpwL
High-speed ARM9 System-on-chip Processor with MaverickCrunch
t
t
WRpwH
DQMpwH
t
t
HCLK
HCLK
t
Min
HCLK
7
-
-
-
-
-
-
-
-
t
DAh
− 3
× 2
t
ADd
t
DAV
t
t
WRpwL
DQMpwL
t
t
HCLK
HCLK
t
t
WRpwH
DQMpwH
t
HCLK
× (WST1 + 1)
× (WST1 + 1)
Typ
-
-
-
-
-
-
-
-
-
t
DAh
× 2
t
ADd
t
DAV
t
CSh
t
ADh
(t
(t
HCLK
HCLK
t
HCLK
Max
× 2) + 14
2
1
8
× 2) + 7
-
-
-
-
-
-
t
DAh
+ 6
EP9302
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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