Basic sdram timing parameters -29, Sdram_read_diffbank_diffrow -29, Figure 6-5 – Intel PXA255 User Manual
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Intel® PXA255 Processor Developer’s Manual
6-29
Memory Controller
Figure 6-5. Basic SDRAM Timing Parameters
Figure 6-6. SDRAM_Read_diffbank_diffrow
CL
CL
tRCD
tRCD
tRP
tRP
bank
row
col
0
1
2
3
tRP = 2 clks
tRAS = 2 clks
tRCD = 2 clks
CL = 2 clks
0000
0ns
50ns
100ns
150ns
200ns
SDCLK
nSDCS
MA[24:0]
nSDRAS
nSDCAS
nWE
DATA
DQM[3:0]
CL
CL
tRCD
tRCD
tRP
CL
tRP
CL
tRCD
tRCD
row
col
0
1
2
3
0000
tRP = 2 clks
tRAS = 7 clks
tRCD = 2 clks
CL = 2 clks
bank0
row
1
2
3
4
col
0ns
25ns
50ns
75ns
100ns
125ns
SDCLK
nSDCS
MA[24:0]
nSDRAS
nSDCAS
nWE
DATA
DQM[3:0]