7. ERRORS AND TROUBLESHOOTING
This section describes most recently encountered problems, errors and fixing solutions.
Problem:
LED D1 (see Figure 1) Dark.
Causes
: This problem can accrue when external power supply connected to
HC912-
Programmer
is damaged or connected in wrong polarity.
Solutions:
Check voltage on
HC912-Programmer
power clamps. It must be 12 V +/- 1V.
Problem:
LED D1 (see Figure 1) Red.
Causes
: These problem can
appear in two cases: if
HC912-Programmer
is in the service
mode (JP1 removed) and if some error accrue while operation of
HC912-
Programmer.
Solutions:
Insert jumper JP1 (see Figure 1), remove adaptors from Motorola device socket
and cable from ICP connector, turn-off and than turn-on power supply connected
to
HC912-Programmer.
If LED D1 still red contact ETL technical support.
Error Message:
MC68HC912 Programmer not found
Causes:
This message can appear when
HC912-Programmer
software couldn’t
establish connection with
HC912-Programmer
board.
Solutions:
Check connection of COM port cable from PC to
HC912-Programmer
board
.
Apply power from external power supply to
HC912-Programmer.
In
menu item
“Tools>Comm Port Options” select correct COM port number.
Error Message:
Communication Error
Causes:
This message can appear when Communication between
HC912-
Programmer
and PC is broken.
Solutions:
Try to decrease communication baud rate in “Tools>Comm Port Options”
dialog window. Also this message can appear when COM port cable has
poor contact with DB-9 connectors.
Error Message:
RESET Line must be in 'high' state
Causes:
This message can appear when MCU Reset pin connected to ground through
external components or no oscillation on EXTAL, XTAL pins.
Solutions:
Check MCU reset pin resistance relatively to VSS pin, and if it too low
check passive and active components connected. Or check integrity of
ceramic resonator and passive components connected to EXTAL, XTAL
pins.
Error Message:
BKGD Line must be in 'high' state
Causes:
This message can appear when MCU BKGD pin connected to ground
through external components.
Solutions:
Cut any component from pin.
Error Message:
Pin Tester Errors:
Causes:
T
his message can appear in On-Board programming interface when some
pins has poor contact with QFP adaptor, or pins are damaged.
Solutions:
Clean pins from colophony. Check contacts between adaptor and target
MCU pins. Check short circuits between pins to pins, pins to GND and pins
to VCC.
©ETL 2004-2006
MC68HC912/9S12 Programmer User’s Guide
12
