M5407C3 Freescale Semiconductor, M5407C3 Datasheet - Page 28

• Manufacturer Part Number: M5407C3
• Description: KIT EVAL FOR MCF5407 W/ETHERNET
• Manufacturer: Freescale Semiconductor
• Series: ColdFire®r
• Type: Microprocessorr

Specifications of M5407C3

• Contents: Module and Misc Hardware
• Processor To Be Evaluated: MCF5407
• Interface Type: Ethernet
• For Use With/related Products: MCF5407
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

What Is dBUG?
Most commands can be recognized by using an abbreviated name. For instance, entering
“h” is the same as entering “help”. Thus, it is not necessary to type the entire command
name.
The commands DI, GO, MD, STEP and TRACE are used repeatedly when debugging.
dBUG recognizes this and allows for repeated execution of these commands with minimal
typing. After a command is entered, simply press <RETURN> or <ENTER> to invoke the
command again. The command is executed as if no command line parameters were
provided.
An additional function called the "TRAP 15 handler" allows the user program to utilize
various routines within dBUG. The TRAP 15 handler is discussed at the end of this chapter.
The operational mode of dBUG is demonstrated in Figure 2-1. After the system
initialization, the board waits for a command-line input from the user terminal. When a
proper command is entered, the operation continues in one of the two basic modes. If the
command causes execution of the user program, the dBUG firmware may or may not be
re-entered, depending on the discretion of the user. For the alternate case, the command
will be executed under control of the dBUG firmware, and after command completion, the
system returns to command entry mode.
During command execution, additional user input may be required depending on the
command function.
For commands that accept an optional <width> to modify the memory access size, the valid
values are:
When no <width> option is provided, the default width is .W, 16-bit.
The core ColdFire® register set is maintained by dBUG. These are listed below:
All control registers on ColdFire® are not readable by the supervisor-programming model,
and thus not accessible via dBUG. User code may change these registers, but caution must
be exercised as changes may render dBUG inoperable.
A reference to “SP” (stack pointer) actually refers to general purpose address register
seven, “A7."
2-2
• B8-bit (byte) access
• W16-bit (word) access
• L32-bit (long) access
• A0-A7
• D0-D7
• PC
• SR
Freescale Semiconductor, Inc.
M5407C3 User’s Manual