Freescale Semiconductor MCF5480 User Manual
Page 453

Interface Recommendations
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor
18-5
All memory devices of a single chip select block must have the same configuration and row/col address
width; however, this is not necessary between different blocks. If mixing different memory organizations
in different blocks, the following guidelines will ensure that every block is fully contiguous.
•
If all devices’ row address width is 12 bits, the column address can be
≥ 8 bits.
•
If all devices’ row address width is 13 bits, the column address can be
≥ 8 bits.
•
If all devices’ column address width is 8 bits, the row address can be
≥ 11 bits.
•
x8 and x16 data width memory devices can be mixed (but not in the same space).
•
x32 data width memory devices cannot be mixed with any other width.
Table 18-2. SDRAM Address Multiplexing
Device
Configur
ation
Row bit x
Col bit x
Bank bit
Number
of
Devices
Total
Block
Size
SDCR
[MUX]
Setting
Internal Address
27
26
25
24
23–12
11–10
9–2
64 Mbits
512K x 32 bit 11 x 8 x 2
1
8 MB
00
—
—
—
—
RA11-0 BA1-0 CA7-0
4M x 16 bit
12 x 8 x 2
2
16 MB
00
—
—
—
—
8M x 8bit
12 x 9 x 2
4
32 MB
00
—
—
—
CA8
13 x 8 x 2
01
—
—
—
RA12
16M x 4 bit
12 x 10 x 2
8
64 MB
00
—
—
CA9
CA8
13 x 9 x 2
01
—
—
CA8
RA12
128
Mbits
4M x 32 bit
12 x 8 x 2
1
16 MB
00
—
—
—
—
RA11-0 BA1-0 CA7-0
8M x 16 bit
12 x 9 x 2
2
32 MB
00
—
—
—
CA8
13 x 8 x 2
01
—
—
—
RA12
16M x 8 bit
12 x 10 x 2
4
64 MB
00
—
—
CA9
CA8
13 x 9 x 2
01
—
—
CA8
RA12
32M x 4 bit
12 x 11 x 2
8
128
MB
00
—
CA11
CA9
CA8
13 x 10 x 2
01
—
CA9
CA8
RA12
256
Mbits
16M x 16 bit
12 x 10 x 2
2
64 MB
00
—
—
CA9
CA8
RA11-0 BA1-0 CA7-0
13 x 9 x 2
01
—
—
CA8
RA12
32M x 8 bit
12 x 11 x 2
4
128
MB
00
—
CA11
CA9
CA8
13 x 10 x 2
01
—
CA9
CA8
RA12
64M x 4 bit
12 x 12 x 2
8
256
MB
00
CA12 CA11
CA9
CA8
13 x 11 x 2
01
CA11
CA9
CA8
RA12
512
Mbits
32M x 16 bit
12 x 11 x 2
2
128
MB
00
—
CA11
CA9
CA8
RA11-0 BA1-0 CA7-0
13 x 10x 2
01
—
CA9
CA8
RA12
64M x 8bit
12 x 12 x 2
4
256
MB
00
CA12 CA11
CA9
CA8
13 x 11 x 2
01
CA11
CA9
CA8
RA12