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Debug Module
MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2
28-28 Freescale Semiconductor
Command/Result Formats:
Command Sequence:
Figure 28-23. 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.
1514131211109876543210
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 28-22. 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