Tb1 And J6 Power; Bdm Port - Axiom MCU 68HC912 User Manual

TB1 and J6 Power

The TB1 and J6 connectors provide power input to the board or if J6 is used for input, TB1
maybe used to source additional circuitry. The J6 power jack accepts a standard 2.0 ~ 2.1mm
center barrel plug connector (positive voltage center) to provide the +VIN supply of +7 to +20
VDC @ 300ma minimum (+9VDC nominal). TB1 provides access to the +VIN, GND (power
ground), and +5V power supplies. The CMD912x power supply will provide 500ma of +5V for
user application. +VIN input power should only be applied by J6 or TB1, not both or a supply
conflict may occur and the CMD912x board could be damaged.

BDM PORT

The BDM port on the PM12xxx module is a 6 pin header compatible with the Motorola
Background Debug Mode (BDM) Pod. This allows the connection of a background debugger
for software development, programming and debugging in real-time without using HC12 I/O
resources.
BGND 1 2 GND
3 4 /RESET
5 6 +5V
A Background Debug Module is available from the manufacturer.
See the HC12 Technical Reference Manual for complete
documentation of the BDM.
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