MC9S12XE-Family Reference Manual , Rev. 1.19
Freescale Semiconductor
303
Chapter 8
S12X Debug (S12XDBGV3) Module
Table 8-1. Revision History
8.1
Introduction
The S12XDBG module provides an on-chip trace buffer with flexible triggering capability to allow non-
intrusive debug of application software. The S12XDBG module is optimized for the S12X 16-bit
architecture and allows debugging of CPU12Xand XGATE module operations.
Typically the S12XDBG module is used in conjunction with the S12XBDM module, whereby the user
configures the S12XDBG module for a debugging session over the BDM interface. Once configured the
S12XDBG module is armed and the device leaves BDM Mode returning control to the user program,
which is then monitored by the S12XDBG module. Alternatively the S12XDBG module can be configured
over a serial interface using SWI routines.
8.1.1
Glossary
Revision
Number
Revision Date
Sections
Affected
Description of Changes
V03.18
20 Apr 2007
- Added “Data Bus Comparison NDB Dependency” section
- Clarified effect TRIG has on state sequencer.
V03.19
24 Apr 2007
- Clarified simultaneous arm and disarm effect.
V03.20
14 Apr 2007
- Clarified reserved State Sequencer encodings.
V03.21
23 Oct 2007
- Added single databyte comparison limitation information
- Added statement about interrupt vector fetches whilst tagging.
V03.22
12 Nov 2007
- Removed LOOP1 tracing restriction NOTE.
- Added pin reset effect NOTE.
V03.23
13 Nov 2007
General
- Text readability improved, typo removed.
V03.24
04 Jan 2008
- Corrected bit name.
Table 8-2. Glossary Of Terms
Term
Definition
COF
Change Of Flow.
Change in the program flow due to a conditional branch, indexed jump or interrupt
BDM
Background Debug Mode
DUG
Device User Guide, describing the features of the device into which the DBG is integrated
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages