PIC16F628A vs PIC16F1827

[E-design]

I have an application running on a 16F628A and want to migrate to the 16F1827 because I need more program memory for changes I want to implement. From what I read most say it is a direct replacement apart from the faster speed and more program memory.

Are there any hidden problems to be aware of when switching over from the 16F682A to the 16F1827? I am using the internal clock in my application.

 

[wp100]

I have an application running on a 16F628A and want to migrate to the 16F1827 because I need more program memory for changes I want to implement. From what I read most say it is a direct replacement apart from the faster speed and more program memory.

Are there any hidden problems to be aware of when switching over from the 16F682A to the 16F1827? I am using the internal clock in my application.

Hi,

Seen this ..?

https://ww1.microchip.com/downloads/en/DeviceDoc/41375A.pdf

 

[betwixt]

If you are using a compiler you probably don't need to change anything except for catering for the extra configuraton bits. If you are using assembly language and Microchip's assembler, many of the 'old style' code will automatically be converted to use the new instructions. With other assemblers your mileage may vary.

I have converted several projects for '628A to '1847' without any problems. if you are starting from scratch you will find the new devices are MUCH easier to use, especially when you use lots of data tables as the banking and paging is greatly simplified.

Brian.

 

[E-design]

Hi Brian,

Thanks for the info. From my reading it appears that I only need to alter the OSCCON = 0x6A value for it to be similar to the 628A running on an internal 4 MHz clock with clock output pin enabled. Can you confirm this?

 

[betwixt]

Checking back it was 16F1847s I used as replacements but they are very similar to the '1827.
Yes, loading 0x6A into OSCCON will enable the internal oscillator source at 4MHZ.

Brian.

 

[E-design]

Thanks, I will order some chips and try it out.