HP488 confusion
Posted: Wed Nov 05, 2008 8:28 am
Hi,
I'm very impressed with the look of the E-Blocks system and I'm thinking of buying the HP488 as my first PIC programmer. However, before I do, I'd like to clear up some confusion. Regarding the LVP problem involving port B, I understand that if I want to use the LCD from a PIC that uses RB5 in LVP mode, I have to avoid LVP mode entirely. I further understand that this means I need a 13.5V supply. No problem. The confusion is this: in the manual for the HP488 it says the following:
"If LVP is disabled the programming software PPP will not be able to ID the on board PICmicro ... Then the PPP will indicate that the chip has not been erased. There is no point in continue to try to program the PICmicro."
I understand this to mean that the HP488 with PPP cannot use high-voltage programming mode. This can't be correct because it conflicts with other information about LVP.
I'd appreciate it if someone could please confirm that I will be able to program in high-voltage (13.5V) mode on a PIC that uses RB5 for LVP and further that I will be able to use the LCD properly. The device I am targeting is the PIC18F2550.
Thanks in advance for any light you can shed on this.
John
I'm very impressed with the look of the E-Blocks system and I'm thinking of buying the HP488 as my first PIC programmer. However, before I do, I'd like to clear up some confusion. Regarding the LVP problem involving port B, I understand that if I want to use the LCD from a PIC that uses RB5 in LVP mode, I have to avoid LVP mode entirely. I further understand that this means I need a 13.5V supply. No problem. The confusion is this: in the manual for the HP488 it says the following:
"If LVP is disabled the programming software PPP will not be able to ID the on board PICmicro ... Then the PPP will indicate that the chip has not been erased. There is no point in continue to try to program the PICmicro."
I understand this to mean that the HP488 with PPP cannot use high-voltage programming mode. This can't be correct because it conflicts with other information about LVP.
I'd appreciate it if someone could please confirm that I will be able to program in high-voltage (13.5V) mode on a PIC that uses RB5 for LVP and further that I will be able to use the LCD properly. The device I am targeting is the PIC18F2550.
Thanks in advance for any light you can shed on this.
John