M68ICS05KJ Freescale Semiconductor, M68ICS05KJ Datasheet - Page 99

• Manufacturer Part Number: M68ICS05KJ
• Description: SIM PROGRAM FOR 68HC705KJ/J1A
• Manufacturer: Freescale Semiconductor
• Type: Simulator/Programmerr

Specifications of M68ICS05KJ

• Contents: Programmer, Power Supply, Assembler/Simulator/Debugger, Cable, Software and Documentation
• For Use With/related Products: 68HC705KJ/JIA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6.12.2 Subroutine Stack
During execution of a subroutine, the stack window displays the subroutine stack that indicates
the restored state of the CPU upon return from a subroutine.
6.13 TRACE WINDOW
Use the Trace Window (Figure 6-18) to view instructions captured while tracing is enabled.
To display the Trace Window, enter the SHOWTRACE command in the command line of the
ICS05KJW Status Window.
To enable or disable tracing, enter the TRACE command. If tracing is off, the command will
toggle tracing on; if tracing is on, the command toggles tracing off.
The trace buffer is a 1024 instruction circular buffer that contains all addresses that have been
executed. When the trace window displays instructions, it disassembles instructions at the
addresses stored in the trace buffer. For this reason, the tracing function cannot be used for self-
modifying code. If a buffer slot does not have an address stored in it, the trace window displays
the phrase "No Trace Available". The number in the beginning of a trace line is the slot number
in the trace buffer. The slot number is an offset for the instruction in that slot compared to the
current instruction executing (slot number=0).
M68ICS05KJOM/D
MC68HC05 MCUs store information in the stack (1) during an
interrupt or (2) during execution of a subroutine. The stack window
shows both these possible interpretations of stack data. It is
important to know whether program execution is in an interrupt or
in a subroutine, to know which stack data interpretation is valid.
Figure 6-18. Trace Window
NOTE
SIMULATOR USER INTERFACE
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