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Topic: New Microchip PIC32 chips in DIP packages are coming (Read 49286 times) previous topic - next topic

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #45 –
+ one disadvantage of 18f with ethernet is that you cannot program them as many times as the other ones. For example #twatch uses a PIC 18F67J60 uC which can be programmed only 100 times. + it is only SMD, pin count is too high for DIP.

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #46 –
Quote
which can be programmed only 100 times.

I have found I get significantly more than this. This is rated for the extremes, at normal room temp and 3.3volts you can probably get 1000. Still not great, but better. I guess (no idea!) that it is due to the flash having to tolerate the extra heat from the Ethernet MAC/PHY, so it is a specific type that burns out faster.
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Re: New Microchip PIC32 chips in DIP packages are coming

Reply #47 –
PIC + ENC24 modules seem quite popular. But has anyone tried to use a PIC with one of the silabs CP220x ethernet controllers?

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #48 –
thanks guys. I figured there wasn't a combined ethernet/microcontroller dip package chip. Here is hoping they make a pic32mx5/6/7 in dip package as those are the pic32s with built in ethernet.

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #49 –
Peter sent me the DIP and SOIC size chips. They came today, so I showed them off in today's video blog.
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Re: New Microchip PIC32 chips in DIP packages are coming

Reply #50 –
Does anyone here have an idea, why the PIC32MX1 and PIC32MX2 series chips are only rated for 40 MHz while the 3, 4, 5, 6, and 7 series can be clocked with 80 MHz?  Over the weekend I experimented with a PIC32MX220F032B and had absolutely no problem clocking it with 80 MHz.  Because the needed current per MHz is also lower for the 1 and 2 series than for the 3, 4, 5, 6, and 7 series (about 0.5 mA/Mhz compared to about 1 mA/Mhz) it does not even get as warm as the PIC32MX7 I also used.  Maybe it's just a market segmentation strategy from Microchip?

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #53 –
yes but they "exist" in dip packages. because they exist in dip packages they limited them to 40mhz (I'm pretty sure they use exactly the same die for dip and soic) .. that's just what I think, I have no proof for that theory :)

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #54 –
Hi

if here are developers from Europe on this forum I would like to let them know that Olimex and Microchip will give away 1000 pcs PIC32MX220F032D development boards on Embedded World exhibition.

The forum do not allow me to post external web links so you can read the full details at olimex .dot. wordpress .dot. com :)

Best regards
Tsvetan

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #55 –
Hi Tsvetan, great to see ppl from Olimex here :) ... I'm interested for EWE but I can't see on the http://olimex.wordpress.com/ where it will be. I see it is 28th February - 1st March. Europe is kinda big, are you organizing it in Sofia or ?

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #56 –
[quote author="arhi"]yes but they "exist" in dip packages. because they exist in dip packages they limited them to 40mhz (I'm pretty sure they use exactly the same die for dip and soic) .. that's just what I think, I have no proof for that theory :)[/quote]

Interesting theory.  IMO it would be quite "wasteful" to declare the whole series to be just 40 MHz because of the possibility to get them in PDIP packages.  If this was the reason, it would make more sense to say in the datasheet 80 MHz, with a remark that for PDIP packages only 40 MHz are reasonable.  However, I *did* use the MX2 in a PDIP package, and it worked flawlessly.  Further, why should the PDIP package limit the internal chip clock frequency?  The internal fast RC oscillator runs at only 8 MHz and the 80 MHz clock are then generated by means of the on chip PLL and pre- and post-divider.

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #57 –
I think that beyond 40MHz the PDIP pins will act like antenas.

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #58 –
Maybe, but as already sayed, the high clock frequency is purely *internal*.  No 80 MHz on any PDIP pin.

Re: New Microchip PIC32 chips in DIP packages are coming

Reply #59 –
No Markus, one of the potential properties of PIC32 series is that they can toggle their pins at each clock cycle, with toggle instruction (1 bit manip). This means that (for 80MHz chips) you can got up to 40MHz freq on any digital pin. In practice, I personally got up to 32MHz (4 months ago) when I does some investigations. In PIC32, unlike ARM chips, you have no AHB (althought recent ARM chips corrected this bottlneck with fast IO and fast AHB).