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devel / comp.arch.embedded / The I/O drive characteristics in the Attiny24 Datasheet

SubjectAuthor
* The I/O drive characteristics in the Attiny24 DatasheetJohann Klammer
`- Re: The I/O drive characteristics in the Attiny24 DatasheetJim Jackson

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The I/O drive characteristics in the Attiny24 Datasheet

<tdcuf7$125g$1@gioia.aioe.org>

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https://www.novabbs.com/devel/article-flat.php?id=985&group=comp.arch.embedded#985

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From: klamm...@NOSPAM.a1.net (Johann Klammer)
Newsgroups: comp.arch.embedded
Subject: The I/O drive characteristics in the Attiny24 Datasheet
Date: Mon, 15 Aug 2022 10:00:25 +0200
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 by: Johann Klammer - Mon, 15 Aug 2022 08:00 UTC

Good Morning,

I was trying to guess the R_on from the curves in the datasheet
and got following results:

sinking Ron:
3V 1.4Ohm(maybe wrong)
5V 30Ohm

sourcing Ron:
3V 47Ohm
5V 33Ohm

I belive the 3V curve is wrong. It has the
decimal point of the y axis in the wrong place.

The chart in question is:
Figure 23-19. I/O Pin Output Voltage versus Sink Current (V CC = 3V)
on page 171 of Atmel-7701_Automotive-Microcontrollers-ATtiny24-44-84_Datasheet.pdf

Could someone please confirm or deny that?

Re: The I/O drive characteristics in the Attiny24 Datasheet

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From: jj...@franjam.org.uk (Jim Jackson)
Newsgroups: comp.arch.embedded
Subject: Re: The I/O drive characteristics in the Attiny24 Datasheet
Date: Mon, 15 Aug 2022 21:02:27 -0000 (UTC)
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 by: Jim Jackson - Mon, 15 Aug 2022 21:02 UTC

On 2022-08-15, Johann Klammer <klammerj@NOSPAM.a1.net> wrote:
> Good Morning,
>
> I was trying to guess the R_on from the curves in the datasheet
> and got following results:
>
> sinking Ron:
> 3V 1.4Ohm(maybe wrong)
> 5V 30Ohm
>
> sourcing Ron:
> 3V 47Ohm
> 5V 33Ohm
>
> I belive the 3V curve is wrong. It has the
> decimal point of the y axis in the wrong place.
>
> The chart in question is:
> Figure 23-19. I/O Pin Output Voltage versus Sink Current (V CC = 3V)
> on page 171 of Atmel-7701_Automotive-Microcontrollers-ATtiny24-44-84_Datasheet.pdf
>
> Could someone please confirm or deny that?

Have you asked on the avrfreaks forum?

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