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EP9307-IRZ
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
P31-P33
P34-P36
P37-P39
P40-P42
P43-P45
P46-P48
P49-P50
16
Copyright 20
10 Cirrus Logi
c (All Rights Rese
rved)
DS667F2
EP9307
ARM9 SOC with Ethernet, USB,
Display and Touchs
creen
SDRAM Burst Read Cycle
Figure 3. SDRAM Burst Read Cyc
le 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 201
0 Cirrus Logic (A
ll Rights Reser
ved)
17
EP9307
ARM9 SOC with Etherne
t, USB, Display and To
uchscreen
SDRAM Burst Write Cycle
Figure 4. SDRAM Burst Write Cycle Timin
g Measurement
SDCLK
SDCSn
RASn
CASn
SDWEn
DQMn
AD
DA
t
clk_l
ow
t
clk_high
t
clkrf
t
d
t
h
t
h
n
n +1
n + 2
n + 3
18
Copyright 20
10 Cirrus Logi
c (All Rights Rese
rved)
DS667F2
EP9307
ARM9 SOC with Ethernet, USB,
Display and Touchs
creen
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 Ref
resh Cycle Timing Measurement
SDCLK
SDCSn
RA
Sn
CA
Sn
SDWEn
t
cl
k_lo
w
t
clk_
high
7b
de
t
d
t
h
t
clkrf
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
P19-P21
P22-P24
P25-P27
P28-P30
P31-P33
P34-P36
P37-P39
P40-P42
P43-P45
P46-P48
P49-P50
EP9307-IRZ
Mfr. #:
Buy EP9307-IRZ
Manufacturer:
Cirrus Logic
Description:
Microprocessors - MPU IC Universal Platfrm ARM9 SOC Prcessor
Lifecycle:
New from this manufacturer.
Delivery:
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EMS
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