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buying the right processor for FreeEMS 
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LQFP112 - Up with the play

Joined: Wed Aug 28, 2013 6:07 am
Posts: 146
If you are buying a MP for your bare board FreeEMS project, you see a lot of different part numbers on the S12X chips.
Here are a few breakdowns for the codes they use in order for you to buy a compatible chip. We are using a 112 pin (PV or AL) LQFP (package
Here is an example of a part number:

MC 9 S12X D P 512 (xx) M PV (R)

MC=independent generic *
S or SC=mask production chip
P or PC= prototype

9=flash memory *
3=ROM memory

S12X class of chip *

D=CAN bus *
A=no CAN
B= dont worry about it..???

P=32K RAM *
T=20K RAM
Q=16K RAM
G=12K RAM

512=RAM (can be lower by 64's) *

xx=wafer and mask (probably wont see this)

M=125C rating * (doubt anything will get hotter than C in the case but this is the good stuff)
V=105C rating
C=85C rating

PV=112 pin lead (91 I/O's)
AL=112 pin no lead *
FU=80 pin lead (59 I/O's)
AA=80 pin no lead
FV=144 pin lead (119 I/O's
AG=144 pin no lead

R=Reel pack (or () for no reel pack-- not important)


* denotes ideal package.
Hope this helps, I see a C (85C) temp rated chip on Ebay, buyer beware.

(correct me if you see an error)


Thu Oct 17, 2013 5:59 am
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LQFP112 - Up with the play
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Location: Rotterdam, the Netherlands
Why would you prefer leadfree pins? I'd stay the hell away from those if I was soldering it at home.

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Thu Oct 17, 2013 8:26 am
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I don't think the leaded ones are actually available, are they? I've never physically seen one. All other vehicles have run with CAL, CAG, VAL, VAG, MAL or MAG parts.

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Thu Oct 17, 2013 11:09 am
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LQFP112 - Up with the play
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Location: Rotterdam, the Netherlands
Well that would be an issue indeed. I forget that time hasnt stood still since the introduction of RoHS.
7 Years ago my job was finding leadfree alternatives for the entire component library used by the PCB assembly
factory I worked for (not the most exciting of jobs, but it paid the rent). Stands to reason that component
manufacturers have little to gain from producing leaded variants these days.

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Thu Oct 17, 2013 1:10 pm
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Sorry, I have no basis for my "not available" presumption, but also none of the lead free parts have ever let me down. Lead free solder, on the other hand, can sod off. It's useless.

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DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!


Thu Oct 17, 2013 1:37 pm
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LQFP112 - Up with the play

Joined: Wed Aug 28, 2013 6:07 am
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Leaded may not be available everywhere (or anywhere) so the 'sans plomb' parts would probably be more available, hence cheaper. I just checked inventory at an online broker and they show leaded content as late as 2012 production dates so they are out there, but that stock is 10% of the no lead parts.


Thu Oct 17, 2013 3:45 pm
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LQFP112 - Up with the play

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Damn cheap here! I bought one, well see if its a real FreeScale chip or a Dorito.
http://www.aliexpress.com/item/Mc9s12xd ... 61748.html


Tue Oct 29, 2013 4:59 am
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LOL, good luck!

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DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!


Tue Oct 29, 2013 11:41 am
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LQFP112 - Up with the play

Joined: Wed Aug 28, 2013 6:07 am
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Ha, after buying one for $1.28 (and paying), I guess I exposed a "pricing flaw" as he called it and the dude promptly asked for $20 more before he would ship. I told him to pound sand, ship it or face my feedback wrath! Well, he didn't and neither did I. I just went with next vendor and got one for $12 shipped. We'll see again... And he had the jutspa to tell me, "You Americans! always want quality AND value!!! You think $1.28 is new and genuine???" uh...yeah! You set the price. Its bad to argue with an idiot, its hard to tell which one's which to a bystander.


Mon Nov 04, 2013 5:58 am
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LOL, no surprise :-)

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DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!


Mon Nov 04, 2013 7:03 am
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