Command/result formats: command sequence – Motorola ColdFire MCF5281 User Manual
Page 643
Debug Support
Freescale Semiconductor
30-25
Command/Result Formats:
Command Sequence:
Figure 30-22.
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.
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 30-21.
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
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3