orange 5 programmer MC68HC912 Vfp voltage not detected (00)

[mike255]

Hi guys i wonder if someone can help us out who have a orange 5 programmer

im trying to erase a chip MC68HC912 the programmer is working

but in getting the following error

Vfp voltage not detected (00)

could anyone tell us what the correct settings would be
so i can erase this chip.

i have the orange 5 connected up to a external power supply.

thank you

[mike255]

If any one is trying to erase a Motorola chip of the HC family and you get the error voltage message to low on the Vfp Vector Floating Point line.. therefor it will not erase ..if you check this pin it will only have 4.5v on it ..but to erase copy it needs 12v...so a easy solution is put 12v to the Vfp pin..Ignore the 4.5V leave connected it will still only be 12V on this line.

You can do this in various ways a variable power supply or link 12v from a on board 12 v regulator this will be the input pin.

You can link direct to the Vpf pin put being less than a mm apart from other pins some people can find it can be difficult to solder with out bridging..
So this pin may seen not to have any connections going any where ..but it has because the Vfp pin runs in many under the chip and out to a diode ...so meter this pin continuity to where it is going and solder the 12v to that point.

Erase

VDD/VCC 5V
RESET 5V
GROUND/VSS
RXD that is also the BKGD line.. Back Ground

Set up conections above and with the 12V to the Vfp line ..Erase/copy and done!.

All the above was done in circuit with all pins soldered..connections done with pin header on the pcb ..but if no pin header then meter pins out to connecting points and solder fine wires to these.

Hope this helps.