ep9307 Cirrus Logic, Inc., ep9307 Datasheet - Page 26

• Manufacturer Part Number: ep9307
• Description: Arm9 Soc With Ethernet, Usb, Display, And Touchscreen
• Manufacturer: Cirrus Logic, Inc.

EP9307
ARM9 SOC with Ethernet, USB, Display and Touchscreen
Static Memory Burst Write Cycle
26
AD setup to WRn assert time
AD hold from WRn deassert time
WRN/DQMn deassert to AD transition time
CSn hold from WRn deassert time
CSn to WRn assert delay time
CSn to DQMn assert delay time
DQMn assert time
DQMn deassert time
WRn assert time
WRn deassert time
WRn/DQMn deassert to DA transition time
WRn/DQMn assert to DA valid time
DQMn
WAIT
WRn
CSn
AD
RD
DA
Note:
t
DQMd
t
These characteristics are valid when the Page Mode Enable (Burst Mode) bit is set. See the User's Guide for details.
WRd
t
ADs
Parameter
t
DAv
t
t
DQpwL
WRpwL
Figure 13. Static Memory Burst Write Cycle Timing Measurement
t
t
t
ADd
WRpwH
DQpwH
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Copyright 2005 Cirrus Logic (All Rights Reserved)
t
DAh
Symbol
t
t
t
t
t
WRpwH
DQpwH
WRpwL
DQpwL
t
DQMd
t
t
t
t
t
t
WRd
ADs
ADh
ADd
CSh
DAh
DAv
t
t
HCLK
HCLK
t
Min
HCLK
7
− 3
× 2
t
t
HCLK
HCLK
× (WST1 + 11)
× (WST1 + 1)
Typ
(t
(t
HCLK
HCLK
t
HCLK
Max
× 2) + 14
2
1
8
× 2) + 7
+ 6
t
ADh
DS667PP4
t
CSh
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns