ep9307 Cirrus Logic, Inc., ep9307 Datasheet - Page 23

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

Static Memory 32-bit Read on 16-bit External Bus
DS667PP4
AD setup to CSn assert time
CSn assert to AD transition time
AD transition to CSn deassert time
AD hold from CSn deassert time
RDn assert time
CSn to RDn delay time
CSn assert to DQMn assert delay time
DA setup to AD transition time
DA to RDn deassert time
DA hold from AD transition time
DA hold from RDn deassert time
WAIT
DQMn
WRn
RDn
CSn
DA
AD
t
ADs
Parameter
t
RDd
Figure 10. Static Memory Multiple Word Read 16-bit Cycle Timing Measurement
©
Copyright 2005 Cirrus Logic (All Rights Reserved)
t
DQMd
Symbol
t
t
t
t
RDpwL
t
t
t
t
DQMd
t
t
t
ADd1
ADd2
DAs1
DAs2
DAh1
DAh2
ADs
ADh
RDd
t
ADd1
t
RDpwl
t
DAs1
t
HCLK
t
t
Min
HCLK
HCLK
15
0
0
-
-
-
-
-
+ 12
ARM9 SOC with Ethernet, USB, Display and Touchscreen
t
HCLK
t
DAh1
t
t
HCLK
HCLK
× ((2 × WST1) + 3)
× (WST1 + 1)
× (WST1 + 2)
Typ
t
-
-
-
-
-
-
-
DAs2
-
t
ADd2
t
DQMh
Max
3
1
-
-
-
-
-
-
-
-
-
t
RDh
t
DAh2
t
ADh
EP9307
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
23