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EP9307-CRZR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P50
16 Copyright 2010 Cirrus Logic (All Rights Reserved) DS667F2
EP9307
ARM9 SOC with Ethernet, USB, Display and Touchscreen
SDRAM Burst Read Cycle
Figure 3. SDRAM Burst Read Cycle Timing Measurement
n n + 1 n + 2 n + 3
SDCLK
SDCSn
RASn
CASn
SDWEn
DQMn
CL = 2
AD
DA
CL = 2
t
DAs
t
clk_low
t
clk_high
t
clkrf
t
d
t
d
t
h
t
DAh
t
DQh
t
DQd
n n + 1 n + 2 n + 3
t
DAs
t
DAh
DA
CL = 3
DQMn
CL = 3
t
DQh
DS667F2 Copyright 2010 Cirrus Logic (All Rights Reserved) 17
EP9307
ARM9 SOC with Ethernet, USB, Display and Touchscreen
SDRAM Burst Write Cycle
Figure 4. SDRAM Burst Write Cycle Timing Measurement
SDCLK
SDCSn
RASn
CASn
SDWEn
DQMn
AD
DA
t
clk_low
t
clk_high
t
clkrf
t
d
t
h
t
h
n n +1 n + 2 n + 3
18 Copyright 2010 Cirrus Logic (All Rights Reserved) DS667F2
EP9307
ARM9 SOC with Ethernet, USB, Display and Touchscreen
SDRAM Auto Refresh Cycle
Note: Chip select shown as bus to illustrate multiple devices being put into auto refresh in one access
Figure 5. SDRAM Auto Refresh Cycle Timing Measurement
SDCLK
SDCSn
RASn
CASn
SDWEn
t
clk_low
t
clk_high
7bde
t
d
t
h
t
clkrf
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P50

EP9307-CRZR

Mfr. #:
Buy EP9307-CRZR
Manufacturer:
Cirrus Logic
Description:
Microprocessors - MPU IC Universal Platfrm ARM9 SOC Prcessor
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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