T W R - S 0 8 L L / L H U S E R G U I D E
A P R I L 2 7 , 2 0 1 0
U S E R G U I D E
7
CAUTION:
When powered from the USB bus, do not exceed the 500mA maximum
allowable current drain. Damage to the target board or host PC may result
OSBDM Bootloader
The OSBDM is pre-programmed with a bootloader application to allow field updates. The USB
bootloader communicates with a GUI application running on a host PC. The GUI application
enables OSBDM firmware to be updated at any. Option jumper JP400 enables the bootloader
at startup. Option header JP400 is not populated in default configuration. Refer to Freescale
Application Note
AN3561
for details on using the GUI application and bootloader. The
application note may be found at
www.freescale.com
or at
www.axman.com/support
.
BDM_PORT Header
A compatible HCS12 BDM cable can also be attached to the 6-pin BDM interface header at
J400. This header is not installed in default configurations. This header is provide to allow the
use of alternate programming/debug cables. Refer to the external programming/debug cable
documentation for details on use.
The figure below shows the pin-out for the DEBUG header. This information is included for
completeness.
Figure 1: BDM_PORT Header, J400
J400
BKGD
1
2
GND
See the associated RM for complete DEBUG
documentation
3
4
RESET*
5
6
VDD
NOTE:
This header is not installed in default configuration.
EXTERNAL BDM CABLE
The integrated BDM allows the user to simply and quickly develop and debug application code.
A BDM port header location is provided for use of an external BDM cable if desired. However,
this BDM port header is not populated in default configurations. Use of an external BDM cable
requires the user to install 6-pin header and to remove a 0-ohm resistor. The user must also
provide power to the board unless power is provided through the external BDM cable. The
P&E Multilink BDM cable used most often with Freescale microprocessors does not provide
power to the target board.