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Pic programmer


pilo
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Hi Pilo,

the problem with this programmer is, that it uses the low-voltage programming mode and therefore allocates pin RB5, which - once the mode has been enabled - cannot be used for any other purpose anymore. Consequentialy you cannot drive a LCD module, which requires RB5 as data pin.

Best Regards, Thorsten.

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Hi Pilo,

the problem with this programmer is, that it uses the low-voltage programming mode and therefore allocates pin RB5, which - once the mode has been enabled - cannot be used for any other purpose anymore. Consequentialy you cannot drive a LCD module, which requires RB5 as data pin.

Best Regards, Thorsten.

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hum... But, I put the pic on the programmer, then put it in the midibox... Because I use RB5 in the programmaing sequence then i can't use it anymore??!!?? Maybe I should download the PIC18F datasheet....

I want to make a stand-alone programmer (not in the midibox)... ???

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hum... But, I put the pic on the programmer, then put it in the midibox... Because I use RB5 in the programmaing sequence then i can't use it anymore??!!?? Maybe I should download the PIC18F datasheet....

I want to make a stand-alone programmer (not in the midibox)... ???

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Hi,

Because I use RB5 in the programmaing sequence then i can't use it anymore??!!??

yes!

From the PIC18F452 datasheet

The High Voltage Programming mode is always available, regardless of the state of the LVP bit, by applying VIHH to the MCLR# pin

While in low voltage ICSP mode, the RB5 pin can no longer be used as a general purpose I/O pin.

Best Regards, Thorsten.

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Hi,

Because I use RB5 in the programmaing sequence then i can't use it anymore??!!??

yes!

From the PIC18F452 datasheet

The High Voltage Programming mode is always available, regardless of the state of the LVP bit, by applying VIHH to the MCLR# pin

While in low voltage ICSP mode, the RB5 pin can no longer be used as a general purpose I/O pin.

Best Regards, Thorsten.

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