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Discussion Groups | BasicX | Maximum sink/source current for BX-24 and BX-24p
Discussion forum for the BasicX family of microcontroller chips.
Maximum sink/source current for BX-24 and BX-24p - Chris Odom - Jan 20 10:16:22 2007
Before you all jump on me for not doing my research, I've done some
research but have found a number of conflicting reports. I've also
conducted my own tests on the lab bench and find that my results
don't match the literature values. That said, here are my questions:
1. What is the maximum current output of _one_ BX-24 I/O pin?
(I.e., when the pin is set High.)
2. What is the maximum current output of _one_ BX-24p I/O pin?
3. How much current can _one_ BX-24 I/O pin sink? (I.e., when the
pin is set Low.)
4. How much current can _one_ BX-24p I/O pin sink?
5. How confident are you in your answers?
Thanks in advance for your help.
chris
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
research but have found a number of conflicting reports. I've also
conducted my own tests on the lab bench and find that my results
don't match the literature values. That said, here are my questions:
1. What is the maximum current output of _one_ BX-24 I/O pin?
(I.e., when the pin is set High.)
2. What is the maximum current output of _one_ BX-24p I/O pin?
3. How much current can _one_ BX-24 I/O pin sink? (I.e., when the
pin is set Low.)
4. How much current can _one_ BX-24p I/O pin sink?
5. How confident are you in your answers?
Thanks in advance for your help.
chris
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: Maximum sink/source current for BX-24 and BX-24p - rosa...@aol.com - Jan 20 15:26:53 2007
Hi Chris,
I didn't know how much research you already done .
The are is not too much information about the BX24 I/O pin outputs specification. There is one thing that you can do that I did with my. Find out what chip is using in your BX24. Mine is using an Atmega8535 made by ATMEL. Then I went to the ATMEL web site and found the ATMEGA8535 datasheet in PDF format that is about 321 pages. All the information that your are looking is in this file. Check your BX24 to see which chip they are using and it's the same as mine then go to the ATMEL web side and download the data sheet from them.
Just in case there are 2 datasheet file one is 272 pages and the other is 321 pages.
Tomas Rosario
-----Original Message-----
From: c...@georgeschool.org
To: b...@yahoogroups.com
Sent: Sat, 20 Jan 2007 9:16 AM
Subject: [BasicX] Maximum sink/source current for BX-24 and BX-24p
Before you all jump on me for not doing my research, I've done some
research but have found a number of conflicting reports. I've also
conducted my own tests on the lab bench and find that my results
don't match the literature values. That said, here are my questions:
1. What is the maximum current output of _one_ BX-24 I/O pin?
(I.e., when the pin is set High.)
2. What is the maximum current output of _one_ BX-24p I/O pin?
3. How much current can _one_ BX-24 I/O pin sink? (I.e., when the
pin is set Low.)
4. How much current can _one_ BX-24p I/O pin sink?
5. How confident are you in your answers?
Thanks in advance for your help.
chris
________________________________________________________________________
Check out the new AOL. Most comprehensive set of free safety and security tools, free access to millions of high-quality videos from across the web, free AOL Mail and more.
[Non-text portions of this message have been removed]
______________________________
Stellaris® MCU Family: New Parts, New Package, New Price.
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
I didn't know how much research you already done .
The are is not too much information about the BX24 I/O pin outputs specification. There is one thing that you can do that I did with my. Find out what chip is using in your BX24. Mine is using an Atmega8535 made by ATMEL. Then I went to the ATMEL web site and found the ATMEGA8535 datasheet in PDF format that is about 321 pages. All the information that your are looking is in this file. Check your BX24 to see which chip they are using and it's the same as mine then go to the ATMEL web side and download the data sheet from them.
Just in case there are 2 datasheet file one is 272 pages and the other is 321 pages.
Tomas Rosario
-----Original Message-----
From: c...@georgeschool.org
To: b...@yahoogroups.com
Sent: Sat, 20 Jan 2007 9:16 AM
Subject: [BasicX] Maximum sink/source current for BX-24 and BX-24p
Before you all jump on me for not doing my research, I've done some
research but have found a number of conflicting reports. I've also
conducted my own tests on the lab bench and find that my results
don't match the literature values. That said, here are my questions:
1. What is the maximum current output of _one_ BX-24 I/O pin?
(I.e., when the pin is set High.)
2. What is the maximum current output of _one_ BX-24p I/O pin?
3. How much current can _one_ BX-24 I/O pin sink? (I.e., when the
pin is set Low.)
4. How much current can _one_ BX-24p I/O pin sink?
5. How confident are you in your answers?
Thanks in advance for your help.
chris
________________________________________________________________________
Check out the new AOL. Most comprehensive set of free safety and security tools, free access to millions of high-quality videos from across the web, free AOL Mail and more.
[Non-text portions of this message have been removed]
______________________________
Stellaris® MCU Family: New Parts, New Package, New Price.
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: Maximum sink/source current for BX-24 and BX-24p - stevech11 - Jan 30 14:25:05 2007
re the below...
Per this web site
http://www.zbasic.net/ZX24a.php
the BX24 uses an Atmel AVR ATmega8535 chip. The answers to your
questions can be had by going to Atmel's website or avrfreaks.net and
download the Atmel specifications for that processor in which you'll
find the I/O pins source/sink ratings. Remember that most chips cannot
source/sink the rated current on all pins simultaneously.
Consider too tha the Atmel AVR ATmega8535 is a pretty old and
primitive chip in comparison to chips like the mega644 (as in the ZX24a).
--- In b...@yahoogroups.com, "Chris Odom" wrote:
>
> Before you all jump on me for not doing my research, I've done some
> research but have found a number of conflicting reports. I've also
> conducted my own tests on the lab bench and find that my results
> don't match the literature values. That said, here are my questions:
>
> 1. What is the maximum current output of _one_ BX-24 I/O pin?
> (I.e., when the pin is set High.)
>
> 2. What is the maximum current output of _one_ BX-24p I/O pin?
>
> 3. How much current can _one_ BX-24 I/O pin sink? (I.e., when the
> pin is set Low.)
>
> 4. How much current can _one_ BX-24p I/O pin sink?
>
> 5. How confident are you in your answers?
>
> Thanks in advance for your help.
> chris
>
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Per this web site
http://www.zbasic.net/ZX24a.php
the BX24 uses an Atmel AVR ATmega8535 chip. The answers to your
questions can be had by going to Atmel's website or avrfreaks.net and
download the Atmel specifications for that processor in which you'll
find the I/O pins source/sink ratings. Remember that most chips cannot
source/sink the rated current on all pins simultaneously.
Consider too tha the Atmel AVR ATmega8535 is a pretty old and
primitive chip in comparison to chips like the mega644 (as in the ZX24a).
--- In b...@yahoogroups.com, "Chris Odom"
>
> Before you all jump on me for not doing my research, I've done some
> research but have found a number of conflicting reports. I've also
> conducted my own tests on the lab bench and find that my results
> don't match the literature values. That said, here are my questions:
>
> 1. What is the maximum current output of _one_ BX-24 I/O pin?
> (I.e., when the pin is set High.)
>
> 2. What is the maximum current output of _one_ BX-24p I/O pin?
>
> 3. How much current can _one_ BX-24 I/O pin sink? (I.e., when the
> pin is set Low.)
>
> 4. How much current can _one_ BX-24p I/O pin sink?
>
> 5. How confident are you in your answers?
>
> Thanks in advance for your help.
> chris
>
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: Re: Maximum sink/source current for BX-24 and BX-24p - rosa...@aol.com - Jan 31 6:55:10 2007
Hi,
I checked page 255 of the manual and found the following information.
One pin can sink 20 ma. and source -20 ma. but you need to keep the total sinking current sum
for all pins for port A or port C not to exceed 100 ma.
The total current sum for both port A and B should not exceed 400 ma.
Each ports should not exceed 100 ma.
Here is the link to the manual at ATMEL if you need more information.
http://www.atmel.com/dyn/resources/prod_documents/doc2502.pdf
Rosarite
-----Original Message-----
From: s...@san.rr.com
To: b...@yahoogroups.com
Sent: Sat, 20 Jan 2007 11:31 AM
Subject: [BasicX] Re: Maximum sink/source current for BX-24 and BX-24p
re the below...
Per this web site
http://www.zbasic.net/ZX24a.php
the BX24 uses an Atmel AVR ATmega8535 chip. The answers to your
questions can be had by going to Atmel's website or avrfreaks.net and
download the Atmel specifications for that processor in which you'll
find the I/O pins source/sink ratings. Remember that most chips cannot
source/sink the rated current on all pins simultaneously.
Consider too tha the Atmel AVR ATmega8535 is a pretty old and
primitive chip in comparison to chips like the mega644 (as in the ZX24a).
--- In b...@yahoogroups.com, "Chris Odom" wrote:
>
> Before you all jump on me for not doing my research, I've done some
> research but have found a number of conflicting reports. I've also
> conducted my own tests on the lab bench and find that my results
> don't match the literature values. That said, here are my questions:
>
> 1. What is the maximum current output of _one_ BX-24 I/O pin?
> (I.e., when the pin is set High.)
>
> 2. What is the maximum current output of _one_ BX-24p I/O pin?
>
> 3. How much current can _one_ BX-24 I/O pin sink? (I.e., when the
> pin is set Low.)
>
> 4. How much current can _one_ BX-24p I/O pin sink?
>
> 5. How confident are you in your answers?
>
> Thanks in advance for your help.
> chris
>
________________________________________________________________________
Check out the new AOL. Most comprehensive set of free safety and security tools, free access to millions of high-quality videos from across the web, free AOL Mail and more.
[Non-text portions of this message have been removed]
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
I checked page 255 of the manual and found the following information.
One pin can sink 20 ma. and source -20 ma. but you need to keep the total sinking current sum
for all pins for port A or port C not to exceed 100 ma.
The total current sum for both port A and B should not exceed 400 ma.
Each ports should not exceed 100 ma.
Here is the link to the manual at ATMEL if you need more information.
http://www.atmel.com/dyn/resources/prod_documents/doc2502.pdf
Rosarite
-----Original Message-----
From: s...@san.rr.com
To: b...@yahoogroups.com
Sent: Sat, 20 Jan 2007 11:31 AM
Subject: [BasicX] Re: Maximum sink/source current for BX-24 and BX-24p
re the below...
Per this web site
http://www.zbasic.net/ZX24a.php
the BX24 uses an Atmel AVR ATmega8535 chip. The answers to your
questions can be had by going to Atmel's website or avrfreaks.net and
download the Atmel specifications for that processor in which you'll
find the I/O pins source/sink ratings. Remember that most chips cannot
source/sink the rated current on all pins simultaneously.
Consider too tha the Atmel AVR ATmega8535 is a pretty old and
primitive chip in comparison to chips like the mega644 (as in the ZX24a).
--- In b...@yahoogroups.com, "Chris Odom"
>
> Before you all jump on me for not doing my research, I've done some
> research but have found a number of conflicting reports. I've also
> conducted my own tests on the lab bench and find that my results
> don't match the literature values. That said, here are my questions:
>
> 1. What is the maximum current output of _one_ BX-24 I/O pin?
> (I.e., when the pin is set High.)
>
> 2. What is the maximum current output of _one_ BX-24p I/O pin?
>
> 3. How much current can _one_ BX-24 I/O pin sink? (I.e., when the
> pin is set Low.)
>
> 4. How much current can _one_ BX-24p I/O pin sink?
>
> 5. How confident are you in your answers?
>
> Thanks in advance for your help.
> chris
>
________________________________________________________________________
Check out the new AOL. Most comprehensive set of free safety and security tools, free access to millions of high-quality videos from across the web, free AOL Mail and more.
[Non-text portions of this message have been removed]
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )