mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 540

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

Version 1 ColdFire Debug (CF1_DEBUG)
The examples show the READ_MEM.B{_WS}, READ_MEM.W{_WS} and READ_MEM.L{_WS}
commands.
22.4.1.5.12 READ_PSTB
Read 32 bits of captured PST/DDATA values from the trace buffer at the specified address. The PST trace
buffer contains 64 six-bit entries, packed consecutively into 12 longword locations. See
an illustration of how the buffer entries are packed.
22.4.1.5.13 READ_Rn
If the processor is halted, this command reads the selected CPU general-purpose register (An, Dn) and
returns the 32-bit result. See
If the processor is not halted, this command is rejected as an illegal operation and no operation is
performed.
22.4.1.5.14 READ_XCSR_BYTE
Read the special status byte of XCSR (XCSR[31–24]). This command can be executed in any mode.
22-48
Read PST trace buffer at the specified address
Read general-purpose CPU register
Read XCSR Status Byte
0x40+CRN
0x60+CRN
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
host →
host →
target
target
host →
target
0x2D
Table 22-24
D
D
L
Y
L
Y
target →
PSTB data
[31–24]
XCSR
target →
target →
Rn data
[31–24]
[31-24]
host
host
host
for the CRN details when CRG is 01.
PSTB data
target →
target →
Rn data
[23–16]
[23-16]
host
host
PSTB data
target →
target →
Rn data
[15–8]
[15-8]
host
host
PSTB data
target →
target →
Rn data
[7–0]
[7-0]
host
host
Active Background
Always Available
Non-intrusive
Freescale Semiconductor
Figure 22-16
for