16F877 to 16f877A any Gotcha?

[BOB_SANTANA]

Hi all

i have being using pic16f877 for my projects but microchip advise to use
16f877A for new designs so i am going to order some today.
Just wanted to find out if there is anything specific i need to be aware of when tranfering my programs written for 16F877 to 16f877A

Best Regards
_________________
BOB_Santana

[davekelly]

Microchip have a migration document http://ww1.microchip.com/downloads/en/DeviceDoc/39591a.pdf which details all of the differences.

Basically the analog comparators have been added, and programming is different.

If you have a bootloader, it needs to be changed, as the self programming method is different for the A version.

[vi_ni_ta]

Hey people,
I am a student who is absolutely new to microcontrollers. I am asked to submit a program that display the pressure output in digital format using LCD. am asked to write the program stictly in CCS PIC C. pls help me . got the analog to digital interfacing part rite.. the LCD interface is still an unsolved mystery.. Anybody out there... help me pls...

details:
In PIC Pins
1- reset
2- analog input
9 and 10 - crystal oscillator
15,16,17 and 18- to LCD
22-a switch to choose whether output should be in psi or kilopascal

[BOB_SANTANA]

Thanks for the info Dave
I would get some today and have a go
_________________
BOB_Santana

[ratgod]

@vi_ni_ta
that question probably should be on its own thread but here's an answer anyway,
if your using a 20x4 LCD, look at this thread http://www.ccsinfo.com/forum/viewtopic.php?t=28268
I use this myself with much success, It may possibly be adapted for 2 line LCDs.

[PCM programmer]