Motorola ColdFire MCF5281 User Manual page 697

Command/Result Formats:
15
Byte Command
Result X
Word Command
Result
Longword Command
Result
Command Sequence:
READ (B/W) MS ADDR
??? 'NOT READY'
READ (LONG) MS ADDR
??? 'NOT READY'
Operand Data
Result Data
MOTOROLA
12 11
0x1
X X X X X
0x1
0x1
Figure 29-21. Command/Result Formats
READ
LS ADDR
'NOT READY'
LS ADDR
'NOT READY'
Figure 29-22.
READ
The only operand is the longword address of the requested location.
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.
Chapter 29. Debug Support
Background Debug Mode (BDM)
8 7
0x9 0x0
A[31:16]
A[15:0]
X X
0x9 0x4
A[31:16]
A[15:0]
D[15:0]
0x9 0x8
A[31:16]
A[15:0]
D[31:16]
D[15:0]
READ
MEMORY
'NOT READY'
LOCATION
NEXT CMD
READ
MEMORY
'NOT READY'
LOCATION
MS RESULT
Command Sequence
4 3
0x0
D[7:0]
0x0
0x0
XXX
RESULT
XXX NEXT CMD
BERR 'NOT READY'
XXX
XXX NEXT CMD
LS RESULT
XXX NEXT CMD
BERR 'NOT READY'
0
29-25