CCS C Software and Maintenance Offers
FAQFAQ   FAQForum Help   FAQOfficial CCS Support   SearchSearch  RegisterRegister 

ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

CCS does not monitor this forum on a regular basis.

Please do not post bug Reports on this forum. Send them to support@ccsinfo.com

PIC18F4620 <> 18F46Q10

 
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion
View previous topic :: View next topic  
Author Message
future



Joined: 14 May 2004
Posts: 327

View user's profile Send private message

PIC18F4620 <> 18F46Q10
PostPosted: Tue May 07, 2019 12:44 am     Reply with quote

Hello everybody,

I have just came across this new chip and it looks to be a good cheaper replacement for the 4620 I've been using for years now.

Since this is an old project I also have an old compiler version. Looking at the ccs website does not show support for this Q family.

Before trying I'd like to ask if I should consider trying the 4620 fw on it? What do you think I can do to run the newer chips?


Thank you.
Ttelmah



Joined: 11 Mar 2010
Posts: 14542

View user's profile Send private message

PostPosted: Tue May 07, 2019 3:37 am     Reply with quote

No. Any different chip will require changes to the setup, and fuses at the
least. The new chip uses PPS, so all the peripheral pins will have
to be configured using this, which the 4620 code won't do.
This chip is _new_. Only been out a month. No support even
in the latest compiler. It also already has quite a few errata, so support
for these will need to be added (funnily the errata sheet is dated next month).
Expect support in a month or two. Usually takes this long for new chips
to be added to the database, but if you ask CCS, they may well add this
chip straight away (they will do this).
temtronic



Joined: 01 Jul 2010
Posts: 6770
Location: Greensville,Ontario

View user's profile Send private message

PostPosted: Tue May 07, 2019 7:07 am     Reply with quote

Considering the headaches others have had 'upgrading' PICs, I wouldn't bother. As Mr. T points out it is ENW and already has problems. I have to ask, how much cheaper and what quantity are we talking?
Say it's $1 per PIC cheaper and you use 100 pcs. That's a $100 'savings'. Now consider your R&D time to get it to work. First off, your WORKING code will NOT run on the new PIC, changes have to be made. IF it takes more than 1-2 hours, then all that 'profit' is eaten up by your R&D time. We all know it'll take longer. So that $100 savings is lost, 100 units NOT shipped out, 100 unhappy clients.
I still use TTL<>USB modules at $2 each as it's cheaper overall, to have a known working item than 'save' a buck, literally, per unit.
We only get so many hours in this World, shame to use up a lot of them fighting the 'newest and greatest' PIC....that don't work like the old 'reliable' one....

Jay
future



Joined: 14 May 2004
Posts: 327

View user's profile Send private message

PostPosted: Wed May 08, 2019 8:05 pm     Reply with quote

Thank you for the input.

The cost ratio is 5.30/1.82. Units in the hundreds.

I have been away from the 18f families. Changed to the dspic and xc16 a few years ago.

I was surprised to see cheaper and more powerful micros.
Ttelmah



Joined: 11 Mar 2010
Posts: 14542

View user's profile Send private message

PostPosted: Wed May 08, 2019 11:12 pm     Reply with quote

There are lots of 'current' PIC's (ones that launched perhaps last year),
that cost less than the older PIC's. Have a look at whether any of these
would suit your needs.
What about the 18F47K42. This has become a 'bread and butter' PIC
for jobs wanting the 40pin package. Twice the ROM, Twice the RAM,
$1.54.
Interestingly if you use MicroChip's parametric search, it does not yet
include the Q10, perhaps tells you how new this really is...
Generally newer chips are much more flexible (most PIC's launched in the
last year+ support PPS), usually more RAM and ROM, and lower power.
Be aware though that these are often more susceptible to RF noise than
older PIC's.
future



Joined: 14 May 2004
Posts: 327

View user's profile Send private message

PostPosted: Tue Aug 20, 2019 8:05 pm     Reply with quote

Amazing little device.

The new interrupt system and the shadow registers will help a lot.

I do not think that CCS has added new functions for loading the ivt. I have the manual from March/19.

Have you tried it yet?
Display posts from previous:   
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group