Any 18F pin compatible with 16F877A 44TQFP?

[Speakerguy]

Hi,

I just bought the PICKit 2, which comes with a programmer and an experimenter's board that has a 16F877A chip on it. I would rather code in C and use Microchip's free C18 student edition compiler to see if I want to buy their full version of the C18 compiler.

Is there any PIC18F I can populate in place of the 16F877A and still have their little experimenter's board work? Thanks for any help!

 

[blueroomelectronics]

The 18F4620 is a good replacement.

 

[kchriste]

What about the 18F4525 or 18F4620?

 

[Speakerguy]

The 18F4620 looks like it will do, except the PGM pin (pin 15 on the 18F4620) is not the same as it is on the 16F877A (PGM is pin 11). I can jumper pin 11 over to pin 15 to get the PGM signal to the 18F4620, but will having the PGM signal on both the pin 11 (RB3/AN9/CCP2 on the 18F4620) and pin 15 (the new PGM pin) cause problems during ICSP? Basically, will having a signal on RB3/AN9/CCP2 during ICSP cause problems? Thanks!

 

[kchriste]

The PGM pin is only needed for low voltage programming. Normally, you just need MCLR, PGD & PGC (pins 18, 17 & 16) for regular programming mode so I wouldn't worry about jumpering it over. I always clear the LVP bit in config so that the pin can be used for general IO. Maybe post a link to the diagram of your experimenters board to be 100% sure.

 

[Speakerguy]

Thank you kchriste! You made me actually go look up the manual/data sheet for the board that came with the PICKit 2, and it has a whole list of 44TQFP compatible devices that are compatible! You guys are right, the 18F4620 and its sibling is compatible, as are:

• PIC16F74 • PIC16F747 • PIC16F77
• PIC16F777 • PIC16F871 •
• PIC16F877A • PIC16F887 • PIC16F914
• PIC16F917 • PIC18F4220 • PIC18F4221
• PIC18F4320 • PIC18F4321 • PIC18F4331
• PIC18F4410 • PIC18F4420 • PIC18F4423
• PIC18F4431 • PIC18F4450 • PIC18F4455
• PIC18F4480 • PIC18F44J10 • PIC18F4510
• PIC18F4515 • PIC18F4520 • PIC18F4523
• PIC18F4525 • PIC18F4550 • PIC18F4580
• PIC18F4585 • PIC18F45J10 • PIC18F4610
• PIC18F4620 • PIC18F4680 • PIC18F4682
• PIC18F4685
**broken link removed** for the 44 pin board available here (3rd link).

So out of these, which is the most popular/powerful or combination thereof? I would like to use what is popular with other hobbyists but also on the high-performance end of things. Thanks again!

 

[blueroomelectronics]

18f4620

 

[Speakerguy]

Awesomeness. I saw the only thing additional the higher-numbered ones had was CAN, and I don't plan on building a car anytime soon