[time-nuts] Follow-up question re: microcontroller families
lists at rtty.us
Sat May 25 21:26:02 EDT 2013
I realize this is a bit like water torture - sorry about that.
If I go to Microchip Direct and ask for a PIC 18F with two UARTS and two A/D's I get the PIC18F86J72 and PIC 18F87J72. To me the second one is the obvious winner. It's got twice the flash for next to nothing more money. 1-25 piece price is $6.04.
Same search, 1 A/D, 4 UARTS, lowest cost this time. PIC18F65J94 is the winner. Lowest price package is $3.30 in 1-25 pieces.
Are those some *very* arbitrary choices - you bet they are. They are random picks, and were not optimized to show any particular thing. Only to target an application that had some serial i/o and a bit of A/D involvement.
Bottom line - not all PIC's are $1. once you start adding peripherals. For $6 over in ARM land, you can get a lot of chip. To be fair, my experience has been that you can do better in the PIC24 line once you start adding stuff. Searching the PIC24's is hard enough that my brief search tonight did not show up a lower cost part.
On May 25, 2013, at 9:05 PM, Bob Camp <lists at rtty.us> wrote:
> I just realized the "buy direct" button on that page requires a login. The single piece direct price is $9.70. First price break is at 25 pieces (to $8.95).
> On May 25, 2013, at 8:56 PM, Bob Camp <lists at rtty.us> wrote:
>> It's one of the Freescale K60's they have them in several speeds and packages. Others have similar parts.
>> hopefully shows the family information
>> The first part on the list is the MK60FN1M0VLQ12 for 8% more money you can get the 150 MHz core rather than the 120 MHz core version. Both have enough pins that you can get at a lot of the peripherals at once. Both have enough pins that they are not a lot of fun to solder by hand. Of course their BGA cousins are even less hand solder friendly….
>> On May 25, 2013, at 6:48 PM, Graham / KE9H <timenut at austin.rr.com> wrote:
>>> On 5/25/2013 3:40 PM, Bob Camp wrote:
>>>> You can get a part with 1MB of flash, 128KB of ram, 6 UARTS, 4 16 bit A/D's, 10/100 Ethernet, USB, and a bunch of other stuff for less than $10. Drop this and that, go to half the flash, and yup, the price is 1/2. Comes with a free toolchain and two very capable free versions of RTOS.
>>> I was wondering which manufacturer/part you were referring to.
>>> --- Graham
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