Figure 6-2. sdram memory system example – Intel PXA26X User Manual
Page 195
Intel® PXA26x Processor Family Developer’s Manual
6-5
Memory Controller
Figure 6-2. SDRAM Memory System Example
shows an alternate memory configuration. This system uses 2 megabyte x 16 SMROM
devices in static banks 0 and 1, and RAM devices in static bank 2.
4Mx16
SDRAM
nCS
nRAS
nCAS
CLK
CKE
nWE
addr(11:0)
BA(1:0)
DQML
DQMH
DQ(15:0)
4Mx16
SDRAM
nCS
nRAS
nCAS
CLK
CKE
nWE
addr(11:0)
BA(1:0)
DQML
DQMH
DQ(15:0)
4Mx16
SDRAM
nCS
nRAS
nCAS
CLK
CKE
nWE
addr(11:0)
BA(1:0)
DQML
DQMH
DQ(15:0)
4Mx16
SDRAM
nCS
nRAS
nCAS
CLK
CKE
nWE
addr(11:0)
BA(1:0)
DQML
DQMH
DQ(15:0)
4Mx16
SDRAM
nCS
nRAS
nCAS
CLK
CKE
nWE
addr(11:0)
BA(1:0)
DQML
DQMH
DQ(15:0)
4Mx16
SDRAM
nCS
nRAS
nCAS
CLK
CKE
nWE
addr(11:0)
BA(1:0)
DQML
DQMH
DQ(15:0)
MD(31:0)
DQM(3:0)
MA(23:10)
SDCLK(2:1)
nSDRAS, nSDCAS, nWE, CKE(1)
nSDCS(2:0)
0
0
1
1
2
2
1
1
1
1
2
2
21:10
23:22
15:0
31:16
0
3
2
31:16
31:16
15:0
15:0
23:22
23:22
23:22
23:22
23:22
21:10
21:10
21:10
21:10
21:10
1
1
1
0
0
2
3
3
2