Microcontroller User's Manual

2-20 MCF5282 User’s Manual MOTOROLA
Processor Exceptions
23–20 RAM0SIZ RAM bank 0 size. The first RAM bank can be used for either SRAM or Flash. The first encodings
shown are used to indicate the size of a RAM bank, and the second set of encodings indicate the
size for a Flash bank. On the MCF5282, RAM0 is associated with the on-chip Flash, so these bits
use the Flash encodings.
RAM size encodings:
0x0–0x3 No RAM.
0100 4KB RAM.
0101 8KB RAM.
0110 16KB RAM.
0111 32KB RAM.
1000 64KB RAM.
1001 128KB RAM.
0xA–0xF Reserved.
Flash size encodings:
0x0–0x7 No Flash.
1000 64KB Flash.
1001 128KB Flash.
1010 256KB Flash.
1011 512KB Flash. (This is the value used for MCF5282)
0xC–0xF Reserved.
19–16 ROM0SIZ ROM bank 0 size.
0x0–0x3 No ROM. (This is the value used for MCF5282)
0100 4KB ROM.
0101 8KB ROM.
0110 16KB ROM.
0111 32KB ROM.
1000 64KB ROM.
1001 128KB ROM.
0xA–0xF Reserved.
15–14 BUSW Encoded bus data width.
00 32-bit data bus (only configuration currently in use).
13–12 DCA Data cache associativity.
00 Four-way.
01 Direct mapped. (This is the value used for MCF5282)
11–8 DCSIZ Data cache size.
0000 No data cache. (This is the value used for MCF5282)
0001 512B data cache.
0010 1KB data cache.
0011 2KB data cache.
0100 4KB data cache.
0101 8KB data cache.
0110 16KB data cache.
0111 32KB data cache.
1000 64KB data cache.
0x9–0xF Reserved.
Table 2-9. D1 Local Memory Hardware Configuration
Information Field Description (continued)
Bits Name Description