16F628a rom problem

sercankurt · Joined: 28 Aug 2021 Posts: 12

Hello everyone,

I used %100 of memory so i got out of rom warning. I decided to buy 16F88 instead my 16F628A. I have to buy 18 pin pic and I heard that 88 has larger memory. But is there another pic even better and larger memory than 16F88 and it should be 18 pin as well? Im afraid that if I write a few more codes anad gives me that warning again.. Which pic shoud I buy with 18pin? Should I buy 16F88? I will need more Memory,
Thank you!!

temtronic · Posted: Wed Sep 29, 2021 2:30 pm

off the top of my head....
I think the 16F648A is the bigger than the 628, same 'family' but more memory, rest is the same ??

jeremiah · Joined: 20 Jul 2010 Posts: 1345

The Microchip website has a chip selector application where you can specify parameters like the number of pins and memory size. It might help you see what is available with your parameters.

Ttelmah · Joined: 11 Mar 2010 Posts: 19504

Yes, the 648A, has double the ROM, 20% more RAM, and double the
EEPROM. Same size chip, and identical peripherals. Got to be the simplest
solution. It is also very close to the same price.
Unfortunately with the latest update at MicroChip, the search tools have
become almost unusable. I've had to take to using the ones at some of
their distributors instead... Sad

newguy · Joined: 24 Jun 2004 Posts: 1907

I've noted the same regarding Microchip's parametric search tool. I googled a bit and managed to find a link to the old tool, but I haven't been able to find it again. I fear they took it down. Rolling Eyes

temtronic · Posted: Thu Sep 30, 2021 7:44 am

I found it a LOT faster to goto Digikey and search PICs there by clicking on ONE criteria at a time to narrow down the selections...
dang there's a LOT of PICs these dayze....

Ttelmah · Joined: 11 Mar 2010 Posts: 19504

Yes, I too had a link to the old tool, that now fails.
The new search just fails completely for me. I wondered if it was because
I was on a Mac, instead of Windows, so 'almost' glad to hear it is not
just me.
However it does make finding a chip vastly harder. Sad

newguy · Joined: 24 Jun 2004 Posts: 1907

Given the overwhelming success of MPLAB X, I suppose that Microchip has reassigned the devs who worked on it to now update their parametric search tool?

/s

Ttelmah · Joined: 11 Mar 2010 Posts: 19504

Brilliant.
Would explain it completely.... Very Happy

jeremiah · Joined: 20 Jul 2010 Posts: 1345

I think the thing here is according to the icrochip pic selector, they have NO 18pin count chips currently in production or planned for the future (at this point in time), so if you want to stick with 18pins, then you need to use parts no longer in production, so pick wisely as your supply only gets lower over time.

gaugeguy · Joined: 05 Apr 2011 Posts: 303

PIC16F1827

Ttelmah · Joined: 11 Mar 2010 Posts: 19504

Actually 1847, for the most memory.

The 'advanced product selector', is still available, via a bit of a detour.

[url]
https://www.microchip.com/maps/microcontroller.aspx
[/url]
(Hurrah).

None of the links inside the current site go to it, but Google, looking for
"MicroChip Advanced Product Selector", inside the Microchip site found it.

If you put in 8bit PIC for the families, select 18pin minimum and 18pin max,
turn off 'mature' (so you only get current or future chips), it gives 18
results, then sort by memory size, it gives the PIC16F1847 as the top hit.

Very Happy

The current 'selector' option, seems to be so badly flawed that it doesn't
even find chips you know exist.
I have emailed MicroChip pointing this out (also many of the links from
the selections then don't work either), so hopefully they will look into it.

temtronic · Posted: Fri Oct 01, 2021 4:55 am

gee, um, wow, kinda scary ..that the 18 pin PIC has become a dinosaur !
I have a LOT of them here...
I feel, well, 'old and obsolete'. sniff, sniff...

Jay

newguy · Joined: 24 Jun 2004 Posts: 1907

Ttelmah: I would suggest that the link be "pinned" to make it easier for not only the old regulars but also any newcomers to be able to find the right PIC for their application.

Good work by the way. Much appreciated!

Ttelmah · Joined: 11 Mar 2010 Posts: 19504

Problem is that the push towards SM, makes it easy to put a 28+ pin
device in the same space. Small DIP packages are a 'dying breed'. However
these are all 'in production' parts, without 'not recommended for new design'
flags, it is just that the websites product selector, has, has stopped finding
them!. This won't help them to be used in new products.... Sad