mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 538

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

Version 1 ColdFire Debug (CF1_DEBUG)
22.4.1.5.9
If the processor is halted, this command reads the selected control register and returns the 32-bit result.
This register grouping includes the PC, SR, CPUCR, VBR, and OTHER_A7. Accesses to processor
control registers are always 32-bits wide, regardless of implemented register width. The register is
addressed through the core register number (CRN). See
If the processor is not halted, this command is rejected as an illegal operation and no operation is
performed.
22.4.1.5.10 READ_DREG
This command reads the selected debug control register and returns the 32-bit result. This register
grouping includes the CSR, XCSR, CSR2, and CSR3. Accesses to debug control registers are always
32-bits wide, regardless of implemented register width. The register is addressed through the core register
number (CRN). See
22-46
Read CPU control register
Read debug control register
READ_CREG
0xE0+CRN
0xA0+CRN
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
host →
host →
target
target
Table 22-4
D
D
L
Y
L
Y
CREG data
DREG data
for CRN details.
target →
target →
[31-24]
[31-24]
host
host
CREG data
DREG data
target →
target →
[23-16]
[23-16]
host
host
Table 22-24
CREG data
DREG data
target →
target →
[15-8]
[15-8]
host
host
CREG data
DREG data
for the CRN details when CRG is 11.
target →
target →
[7-0]
[7-0]
host
host
Active Background
Non-intrusive
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