mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 69

• Manufacturer Part Number: mcf5282
• Manufacturer: Freescale Semiconductor, Inc

ColdFire processors load hardware configuration information into the D0 and D1 general-purpose
registers after system reset. The hardware configuration information is loaded immediately after the
reset-in signal is negated. This allows an emulator to read out the contents of these registers via the BDM
to determine the hardware configuration.
Information loaded into D0 defines the processor hardware configuration as shown in
Freescale Semiconductor
EMAC
31–24
23–20
19–16
Field
MAC
VER
REV
FPU
DIV
PF
Reset
Reset
15
14
13
12
BDM: Load: 0x080 (D0)
W
W
R
R MAC
Processor family. This field is fixed to a hex value of 0xCF indicating a ColdFire core is present.
ColdFire core version number. Defines the hardware microarchitecture version of ColdFire core.
0001 V1 ColdFire core
0010 V2 ColdFire core (This is the value used for this device.)
0011 V3 ColdFire core
0100 V4 ColdFire core
0101 V5 ColdFire core
Else Reserved for future use
Processor revision number. The default is 0b0000.
MAC present. This bit signals if the optional multiply-accumulate (MAC) execution engine is present in processor core.
0 MAC execute engine not present in core. (This is the value used for this device.)
1 MAC execute engine is present in core.
Divide present. This bit signals if the hardware divider (DIV) is present in the processor core.
0 Divide execute engine not present in core.
1 Divide execute engine is present in core.
EMAC present. This bit signals if the optional enhanced multiply-accumulate (EMAC) execution engine is present in
processor core.
0 EMAC execute engine not present in core.
1 EMAC execute engine is present in core. (This is the value used for this device.)
FPU present. This bit signals if the optional floating-point (FPU) execution engine is present in processor core.
0 FPU execute engine not present in core. (This is the value used for this device.)
1 FPU execute engine is present in core.
Store: 0x180 (D0)
31
15
1
0
DIV EMAC FPU
30
14
1
1
29
13
0
1
Table 2-9. D0 Hardware Configuration Info Field Description
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
28
12
0
0
Figure 2-18. D0 Hardware Configuration Info
PF
27
11
1
0
0
26
10
1
0
0
(This is the value used for this device.)
25
1
0
0
9
Description
24
1
0
0
8
23
0
7
1
22
0
6
0
VER
ISA
21
1
0
5
20
0
0
4
19
0
0
3
Access: User read-only
Figure
18
0
0
2
DEBUG
REV
BDM read-only
2-18.
ColdFire Core
17
0
0
1
2-23
16
0
0
0