What are the AVR28DA128 AVR32DA128 AVR48DA128 AVR64DA128 ??

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Something seems to be different with the AVR-Dx protection diodes. Why is their voltage drop so low, and current rating so large? Are they some kind of Schottky diodes?

 

 

edit: no, I measured with a multimeter and they are regular diodes, so IDK why the datasheet says says "VDD + 0.3V" instead of "VDD + 0.5V" as in normal AVRs.

 

Last Edited: Tue. Sep 15, 2020 - 02:06 PM
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El Tangas wrote:

edit: no, I measured with a multimeter and they are regular diodes, so IDK why the datasheet says says "VDD + 0.3V" instead of "VDD + 0.5V" as in normal AVRs.

 

At higher temperatures the voltage drop will be lower so maybe that figure is to cover the whole operating range?

#1 Hardware Problem? https://www.avrfreaks.net/forum/...

#2 Hardware Problem? Read AVR042.

#3 All grounds are not created equal

#4 Have you proved your chip is running at xxMHz?

#5 "If you think you need floating point to solve the problem then you don't understand the problem. If you really do need floating point then you have a problem you do not understand."

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HF crystal was not done as DS says...

 

 

my projects: https://github.com/epccs

Debugging is harder than programming - don’t write code you can’t debug! https://www.avrfreaks.net/forum/help-it-doesnt-work

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Dear Microchip, please may we have one with an on-chip CAN controller peripheral ? Pref in a thru-hole package. Then I can finally tell my PIC-bothering friends to STFU :)

 

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obdevel wrote:
please may we have one with an on-chip CAN controller peripheral ? Pref in a thru-hole package. Then I can finally tell my PIC-bothering friends to STFU :)

This is much more BB friendly than a dip chip  https://www.sparkfun.com/product...

 

 

(Possum Lodge oath) Quando omni flunkus, moritati.

"I thought growing old would take longer"

 

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ki0bk wrote:
This is much more BB friendly than a dip chip  https://www.sparkfun.com/product...
Not very friendly to the pocketbook, though...

"Experience is what enables you to recognise a mistake the second time you make it."

"Good judgement comes from experience.  Experience comes from bad judgement."

"Wisdom is always wont to arrive late, and to be a little approximate on first possession."

"When you hear hoofbeats, think horses, not unicorns."

"Fast.  Cheap.  Good.  Pick two."

"We see a lot of arses on handlebars around here." - [J Ekdahl]

 

Last Edited: Tue. Sep 15, 2020 - 07:33 PM
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pcb files are free for the download, make your own.

 

(Possum Lodge oath) Quando omni flunkus, moritati.

"I thought growing old would take longer"

 

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ki0bk wrote:

pcb files are free for the download, make your own.

 

I may have 'borrowed' elements of that precise design a couple of years back**. I really need on-chip CAN in a DIP package, for which PIC has several options. Many of my designs' users are averse to surface mount assembly. And the AT90CAN is a rather old and expensive part compared to the devices on this thread.

 

** which is how I know that the ICSP interface uses the UART pins and not the usual SPI ones.

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mostly AVR DB in Sept'20 Atmel START

Atmel START Release Notes

 

"Dare to be naïve." - Buckminster Fuller

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"Dare to be naïve." - Buckminster Fuller

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gchapman wrote:

AVR® EA Product Brief

 

Hmm, the MHz on these parts is creeping downwards too ? 

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gchapman wrote:

AVR® EA Product Brief

 

So, slightly cut-down Dx series chips.

#1 Hardware Problem? https://www.avrfreaks.net/forum/...

#2 Hardware Problem? Read AVR042.

#3 All grounds are not created equal

#4 Have you proved your chip is running at xxMHz?

#5 "If you think you need floating point to solve the problem then you don't understand the problem. If you really do need floating point then you have a problem you do not understand."

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A small 28-Pin AVR-EA has one more, practical Type-A TCA timer than same 28-Pin AVR-Dx. The only advantage I can find... 🤔

Last Edited: Sat. Sep 19, 2020 - 10:33 PM

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