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UNTEngineer
10-30-2012, 07:48 AM
Does anyone have a spec sheet and schematics on the Teensy, and more importantly, what kind of power consumption does this thing do when awake and when in power save mode?

Im trying to get an idea of really what sorts of applications this could be good for. Can it run Angstrom Linux if I used an SD card adapter?

cmason
10-30-2012, 03:19 PM
Does anyone have a spec sheet and schematics on the Teensy, and more importantly, what kind of power consumption does this thing do when awake and when in power save mode?

Im trying to get an idea of really what sorts of applications this could be good for. Can it run Angstrom Linux if I used an SD card adapter?


Specs are here, although I don't recall seeing specific power consumption figures:
http://www.kickstarter.com/projects/paulstoffregen/teensy-30-32-bit-arm-cortex-m4-usable-in-arduino

Data sheet:
http://cache.freescale.com/files/32bit/doc/ref_manual/K20P64M50SF0RM.pdf

Processor:
http://web.eecs.umich.edu/~prabal/teaching/eecs373-f10/readings/ARMv7-M_ARM.pdf

Paul has mentioned in the past wanting to use the sophisticated low power features of the chip but I don't think anything has been done yet.

Can angstrom Linux run in 16 k ram?

-c

UNTEngineer
10-31-2012, 12:16 AM
Specs are here, although I don't recall seeing specific power consumption figures:
http://www.kickstarter.com/projects/paulstoffregen/teensy-30-32-bit-arm-cortex-m4-usable-in-arduino

Data sheet:
http://cache.freescale.com/files/32bit/doc/ref_manual/K20P64M50SF0RM.pdf

Processor:
http://web.eecs.umich.edu/~prabal/teaching/eecs373-f10/readings/ARMv7-M_ARM.pdf

Paul has mentioned in the past wanting to use the sophisticated low power features of the chip but I don't think anything has been done yet.

Can angstrom Linux run in 16 k ram?

-c

I was assuming of course that I add a RAM chip in addition to the SD card. Im reading all over that it requires 64mb, but I have no concrete minimum that Angstrom can run on.

Thanks for the spec sheets. Can this be programmed via Arduino? Do I need any special software or libraries?

Paul
10-31-2012, 12:46 AM
Yes, it's meant to be programmed from Arduino. You need this:

http://www.kickstarter.com/projects/paulstoffregen/teensy-30-32-bit-arm-cortex-m4-usable-in-arduino-a/posts/331757

Many separate Arduino libraries are compatible, but some are not (yet) compatible. If you find one of those, please post a detailed and reproducible bug report here.

No, Teensy 3.0 won't run Linux. There is no provision for adding more RAM.

UNTEngineer
10-31-2012, 12:51 AM
Ok thanks for the info.

UNTEngineer
10-31-2012, 04:12 AM
One more thing: whats that SMT footprint on the bottom of the Teensy supposed to be for? It looks like some kind of special connector. Will you be making that connector available for purchase?

Would a connector such as this one, work?

13

Paul
10-31-2012, 05:10 AM
Yes, if the pitch is 0.1 inch (2.54 mm).

tochinet
11-09-2012, 03:02 PM
Paul,

I know you're probably very busy with the production sending etc. of 3.0, but isn't this a good time to "repatriate" the information from kickstarter on your own site/wiki ?

I got mine yesterday. I must say I was impressed with the quality of packing/the small ref cards etc. Talking of SD cards, any easy way to use your uSD card board with 3.0 ?
(Maybe I should have asked before buying ;-)

cmason
11-09-2012, 08:34 PM
I know based on talking with him that he wants to update the site but just hasn't had time.

Maybe we want a wiki as well as a forum?

-c

UNTEngineer
11-10-2012, 07:21 AM
Any openly available schematics to the Teensy 3.0, as with the Teensy 2.0 and Teensy ++?

recri
11-11-2012, 07:23 AM
One missing document is the actual data sheet for the K20 family:

http://cache.freescale.com/files/32bit/doc/data_sheet/K20P64M50SF0.pdf

This sets out the power and frequency limits for this sub-family. For instance, the ADC clock, ADCK, for the Teensy 3.0 must be between 1 MHz and 18 MHz for 13 bit conversions or smaller, and between 2 MHz and 12 MHz for 16 bit conversions. That results in 20-818 kSPS for 13 bit conversions or smaller, 37-461 kSPS for 16 bit conversions.

You might also want the "K20 Family Fact Sheet" and "K20 Family Brief" documents to explain which features are present/absent on particular parts. You can get links to all three of these documents by searching "MK20DX128VLH5", the Teensy 3.0 processor part number, and following the digikey.com link to the part page.