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EP9315-IBZ
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-P51
P52-P54
P55-P57
P58-P60
P61-P63
P64-P64
16
Copyright 20
10 Cirrus Logi
c (All Rights Rese
rved)
DS638F2
EP9315
Enhanced Universal Platform
SOC Processor
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
DS638F2
Copyright 201
0 Cirrus Logic (A
ll Rights Reser
ved)
17
EP9315
Enhanced Univ
ersal Platform SOC Processor
SDRAM Burst Write Cycle
Figure 4. SDRAM Burst Write Cycle Timin
g 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 20
10 Cirrus Logi
c (All Rights Rese
rved)
DS638F2
EP9315
Enhanced Universal Platform
SOC Processor
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-P51
P52-P54
P55-P57
P58-P60
P61-P63
P64-P64
EP9315-IBZ
Mfr. #:
Buy EP9315-IBZ
Manufacturer:
Cirrus Logic
Description:
Microprocessors - MPU IC Universal Platfrm ARM9 SOC Prcessor
Lifecycle:
New from this manufacturer.
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