EP9307 Datasheet, PDF (22/48 Pages) Cirrus Logic – ARM9 SOC WITH ETHERNET USB DISPLAY AND TOUCHSCREEN

EP9307
ARM9 SOC with Ethernet, USB, Display and Touchscreen
Static Memory 32-bit Write on 8-bit External Bus
Parameter
AD setup to WRn assert time
WRn 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
Symbol
t_ADs
t_ADd
t_ADh
t_CSh
t_WRd
t_WRpwL
t_WRpwH
t_DQMd
t_DQMpwL
t_DQMpwH
t_DAh
Min
-
-
-
-
-
-
-
-
-
-
-
Typ
t_HCLK
t_HCLK
t_HCLK × 3
t_HCLK
0
t_HCLK × (WST1 + 1)
t_HCLK × 2
0
t_HCLK × (WST1 + 1)
t_HCLK × 2
t_HCLK
Max
-
-
-
-
-
-
-
-
-
-
-
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t_ADs
AD
CSn
WRn
t_{W Rd}
RDn
DQMn
t_{D Q M d}
DA
W AIT
t_ADd
t_ADd
t_ADd
t_ADh
t_{W RpwL}
t_{W RpwH}
t_{W RpwL}
t_{W RpwH}
t_{W RpwL}
t_{W RpwH}
t_CSh
t_{D Q M pwL}
t_{D Q M pw L}
t_{D Q M pwL}
t_{D Q M pwH}
t_{D Q M pw H}
t_DQMpwH
t_DAh
t_DAh
t_DAh
Figure 9. Static Memory Multiple Word Write 8 bit Cycle Timing Measurement
t_DAh
22
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