Intel PXA26X - Manual (Page 217)

Intel® PXA26x Processor Family Developer’s Manual 6-27
Memory Controller
6.6.6 SDRAM Waveforms
Additional waveforms for the SDRAM controller are shown in Figure 6-5 , Figure 6-6 , Figure 6-7 ,
Figure 6-8 , Figure 6-9 , Figure 6-10 .
Figure 6-5. SDRAM Read
Figure 6-6. SDRAM Read With a Second Read to Same Bank, Same Row
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 CL CL tRCD tRCD tRP tRP
bank row col
0 1 2 3
0000
tRP = 2 clks
tRAS = 5 clks
tRCD = 2 clks
CL = 2 clks
col
4 5 6 7
0ns 50ns 100ns
SDCLK
nSDCS
MA[24:0]
nSDRAS
nSDCAS
nWE
DATA
DQM[3:0]