mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 201

• Manufacturer Part Number: mcf5407
• Description: Mcf5407 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

1
5.5.3.3.13 Write Debug Module Register (
The operand (longword) data is written to the specified debug module register. All 32 bits
of the register are altered by the write. DSCLK must be inactive while the debug module
register writes from the CPU accesses are performed using the WDEBUG instruction.
Command Format:
Table 5-6 shows the definition of the DRc write encoding.
Command Sequence:
Operand Data:
Result Data:
5.6 Real-Time Debug Support
The ColdFire Family provides support debugging real-time applications. For these types of
embedded systems, the processor must continue to operate during debug. The foundation
of this area of debug support is that while the processor cannot be halted to allow
debugging, the system can generally tolerate small intrusions into the real-time operation.
The debug module provides three types of breakpoints—PC with mask, operand address
range, and data with mask. These breakpoints can be configured into one- or two-level
triggers with the exact trigger response also programmable. The debug module
programming model can be written from either the external development system using the
debug serial interface or from the processor’s supervisor programming model using the
WDEBUG instruction. Only CSR is readable using the external development system.
15
Note: 0x4 is a three-bit field
0x2
12
WDMREG
Figure 5-44.
???
Figure 5-45.
Longword data is written into the specified debug register. The data
is supplied most-significant word first.
Command complete status (0xFFFF) is returned when register write
is complete.
11
0xC
Chapter 5. Debug Support
WDMREG
"NOT READY"
"ILLEGAL"
MS DATA
WDMREG
XXX
D[31:16]
8
D[15:0]
BDM Command Format
Command Sequence
7
"NOT READY"
"NOT READY"
NEXT CMD
LS DATA
WDMREG
0x4
1
5
)
"CMD COMPLETE"
NEXT CMD
4
Real-Time Debug Support
DRc
5-45
0