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isochronic
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Joined: 21/01/2012
Location: Australia
Posts: 689

Posted: 05:27pm 25 Jun 2017

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A faster '170 : [soic, no sdip though]

pic32mx174

Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9748

Posted: 12:28am 26 Jun 2017

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Interesting......

IF this chip was worthy of pick-up by Geoff and Peter, it would be a drop-in replacement for the standard SOIC 170 chip on the Explore-28 module.

Smoke makes things work. When the smoke gets out, it stops!

CaptainBoing

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Joined: 07/09/2016
Location: United Kingdom
Posts: 2171

Posted: 01:10am 26 Jun 2017

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oooh! Nice!

The 17x is still a very capable device and ideal for smaller installations.

I use loads of them with HC12s in wireless networks for things as diverse as snooker table light control, beer-barrel sterilization and customer feedback pods. They all use encryption on their traffic and I recently had to write a simple rolling encryption routine because the stock 170 struggled to keep up on throughput of longer RC4 encrypted strings in rapid succession. I have shied away from converting an MD5 routine I have (not deprecated like RC4) for the same reason.

The 50% extra grunt would immediately allow me to harden the radio chatter.

hopeful

Edited by CaptainBoing 2017-06-27

Geoffg

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Joined: 06/06/2011
Location: Australia
Posts: 3308

Posted: 02:59am 26 Jun 2017

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I have have been experimenting with the MX174 as an advanced Micromite and unfortunately it is not a straight drop in replacement for the MX170. However I am hoping to get the firmware to dynamically switch between the two chips.

Watch this space.

Geoff

Geoff Graham - http://geoffg.net

WhiteWizzard
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Joined: 05/04/2013
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Posted: 07:18am 26 Jun 2017

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Geoffg said However I am hoping to get the firmware to dynamically switch between the two chips.

Watch this space.

WhiteWizzard
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Posted: 07:23am 26 Jun 2017

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Where can you get the 174's from? I can't see the DIP anywhere??

twofingers

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Joined: 02/06/2014
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Posts: 1669

Posted: 08:08am 26 Jun 2017

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WhiteWizzard said Where can you get the 174's from? I can't see the DIP anywhere??

There are no DIPs!

Michael

causality ≠ correlation ≠ coincidence

WhiteWizzard
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Posts: 2959

Posted: 08:14am 26 Jun 2017

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twofingers said There are no DIPs!

At least that explains why I can't find any!!!

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10565

Posted: 08:32am 26 Jun 2017

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Quote I have have been experimenting with the MX174 as an advanced Micromite

Geoff, I assume you have seen the extensive errata

In particular, note that the CLK0 pin is an output on power up regardless of config so this pin isn't safe to have connected without a current limiting resistor.

I also really like this one (NOT!!!)

Quote The user application must not attempt to enter Deep Sleep
mode for a period of 50 �s after exiting Reset on start-up or the
device will never recover and is no longer able to be erased
and/or reprogrammed.

This one is also dangerous if programming a part in circuit

Quote Hardware automatically configures and enables the TDO
output pin function, which toggles when any PGECx/PGEDx
pair are used during programming

Edited by matherp 2017-06-27

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