Motorola MCF5281 사용자 설명서
MOTOROLA
Chapter 29. Debug Support
29-25
Background Debug Mode (BDM)
Command/Result Formats:
Command Sequence:
Figure 29-22.
READ
Command Sequence
Operand Data
The only operand is the longword address of the requested location.
Result Data
Word results return 16 bits of data; longword results return 32. Bytes
are returned in the LSB of a word result; the upper byte is undefined.
0x0001 (S = 1) is returned if a bus error occurs.
are returned in the LSB of a word result; the upper byte is undefined.
0x0001 (S = 1) is returned if a bus error occurs.
15
12
11
8
7
4
3
0
Byte
Command
0x1
0x9
0x0
0x0
A[31:16]
A[15:0]
Result
X
X
X
X
X
X
X
X
D[7:0]
Word
Command
0x1
0x9
0x4
0x0
A[31:16]
A[15:0]
Result
D[15:0]
Longword Command
0x1
0x9
0x8
0x0
A[31:16]
A[15:0]
Result
D[31:16]
D[15:0]
Figure 29-21.
READ
Command/Result Formats
XXX
’NOT READY’
READ (LONG)
???
MS ADDR
’NOT READY’
LS ADDR
’NOT READY’
NEXT CMD
’NOT READY’
NEXT CMD
LS RESULT
READ
MEMORY
LOCATION
XXX
BERR
XXX
MS RESULT
XXX
’NOT READY’
READ (B/W)
???
MS ADDR
’NOT READY’
LS ADDR
’NOT READY’
NEXT CMD
’NOT READY’
READ
MEMORY
LOCATION
XXX
BERR
NEXT CMD
RESULT