mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 183

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

1
2
Output the
current PC
Read control
register
Write control
register
Read debug
module
register
Write debug
module
register
Unassigned command opcodes are reserved by Motorola. All unused command formats
within any revision level perform a
5.5.3.1 ColdFire BDM Command Format
All ColdFire Family BDM commands include a 16-bit operation word followed by an
optional set of one or more extension words, as shown in Figure 5-18.
Table 5-22 describes BDM fields.
Command
15–10 Operation Specifies the command. These values are listed in Table 5-21.
9
8
General command effect and/or requirements on CPU operation:
- Halted. The CPU must be halted to perform this command.
- Steal. Command generates bus cycles that can be interleaved with bus accesses.
- Parallel. Command is executed in parallel with CPU activity.
0x4 is a three-bit field.
15
Bit
0
R/W
Name
SYNC
RCREG
WCREG
RDMREG
WDMREG
Mnemonic
Operation
_
PC
Reserved
Direction of operand transfer.
0 Data is written to the CPU or to memory from the development system.
1 The transfer is from the CPU to the development system.
Table 5-21. BDM Command Summary (Continued)
Capture the current PC and display it on the
PSTDDATA output pins.
Read the system control register.
Write the operand data to the system control
register.
Read the debug module register.
Write the operand data to the debug module
register.
Figure 5-18. BDM Command Format
Table 5-22. BDM Field Descriptions
10
Chapter 5. Debug Support
Description
NOP
0
9
Extension Word(s)
and return the illegal command response.
R/W
8
7
Op Size
Description
6
0
5
Background Debug Mode (BDM)
Parallel
Parallel
Parallel
State
Halted
Halted
CPU
0
4
1
A/D
5.5.3.3.10 0x2980
5.5.3.3.11 0x2880
5.5.3.3.12 0x2D {0x4
5.5.3.3.13 0x2C {0x4
3
5.5.3.3.9 0x0001
Section
2
Register
DRc[4:0]}
Drc[4:0]}
Command
(Hex)
5-27
2
2
0