The differend between the PIC 16F628 and the PIC 16f628A ? Help!

C

Cees

New Member

• Dec 1, 2011

• #1

I start a new course and there has been used the PIC 16F629A. I have 2x PIC 16F628 in stock. Can I use these PIC's. In other words, these two are completely compatible PIC?

with kind recards

Cees

 

Last edited: Dec 1, 2011

alec_t

Well-Known Member

Most Helpful Member

• Dec 1, 2011

• #2

Check the datasheets.

 

C

Cees

New Member

• Dec 1, 2011

• #3

already did, but the question remains: can I just use the 628 as the 628A in the diagrams of the course is?

 

House0Fwax

Member

• Dec 1, 2011

• #4

Essentially, yes. They are pin compatable, however, they don't just put an 'A' after it for nothing. Depending on what code you are using, they 'might' behave differently.
*Caveat. I'm basing my reply on the title of the thread.

 

Last edited: Dec 1, 2011

C

Cees

New Member

• Dec 1, 2011

• #5

Thanks for your fast answer, I think it is better to take no risk and buy the A version.

What's the difference, it remains a mystery to me.

 

Last edited: Dec 1, 2011

Mr RB

Well-Known Member

• Dec 1, 2011

• #6

Have a look at the 16F628 "errata" document from Microchip;
https://www.electro-tech-online.com/custompdfs/2011/12/80073f.pdf

There were some issues with the 628 that forced them to do some significant redesign and make the 628A. From memory I think there was a bad issue with the special LVP (low voltage programming) mode, but that is not an issue if you use a normal Vpp PIC programmer. The errata pdf will explain all the problems with the 628.

 

C

Cees

New Member

• Dec 2, 2011

• #7

Hi, Now it is clear to me, I understand from this that at 5 Volts programming there are no problems and that is the case with me. Finally someone with fuiste information, thanks for that

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Dec 2, 2011

• #8

I can't say I've ever heard that, but it could well be true?.

However, the A versions are simply a later silicon revision - I suspect it's mostly just using a later (and cheaper) manufacturing technique.

 

S

skyhawk

New Member

• Dec 2, 2011

• #9

Migration document

Microchip produces documentation that directly addresses questions such as this. They are called migration documents. Here is the one you need:

https://www.electro-tech-online.com/custompdfs/2011/12/40048a.pdf

The differences are minor. The biggest are a change in one of the oscillator modes and a bug fix for the comparator operation.

 

Last edited: Dec 2, 2011