Datasheet

11-10 MCF5407 User’s Manual
Asynchronous Operation
Note that in Table 11-8, MCF5407 pin A19 is not connected because DRAM address bit 18
is already provided on MCF5407 pin A18; thus, the next MCF5407 pin used should be A20.
Table 11-7. DRAM Addressing for Byte-Wide Memories
MCF5407 Address Pin
MCF5407 Address Bit
Driven for RAS
MCF5407 Address Bit Driven
when CAS is Asserted
Memory Size
17 17 0 Base memory size of
256 Kbytes
16 16 1
15 15 2
14 14 3
13 13 4
12 12 5
11 11 6
10 10 7
99 8
19 19 18 1 Mbyte
21 21 20 4 Mbytes
23 23 22 16 Mbytes
25 25 24 64 Mbytes
Table 11-8. DRAM Addressing for 16-Bit Wide Memories
MCF5407 Address Pin
MCF5407 Address Bit
Driven for RAS
MCF5407 Address Bit Driven
when CAS is Asserted
Memory Size
16 16 1 Base memory size of
128 Kbytes
15 15 2
14 14 3
13 13 4
12 12 5
11 11 6
10 10 7
99 8
18 18 17 512 Kbytes
20 20 19 2 Mbytes
22 22 21 8 Mbytes
24 24 23 32 Mbytes