SparkFun Electronics - ATmega328 with Arduino Bootloader

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ATmega328 with Arduino Bootloader

sku: DEV-09217

Description: The name says it all on this one. An ATmega328 in DIP package, pre-loaded with the Arduino (16MHz) Bootloader. This will allow you to use Arduino code in your custom embedded project without having to use an actual Arduino board.

To get this chip working with Arduino IDE, you will need an external 16MHz crystal or resonator, a 5V supply, and a serial connection. If you are not comfortable doing this, we recommend purchasing the Arduino Duemilanove board that has all of these built into the board.

Atmel's ATMega328 8-Bit Processor in 28 pin DIP package. It's like the ATmega168, with double the flash space. 32K of program space. 23 I/O lines, 6 of which are channels for the 10-bit ADC. Runs up to 20MHz with external crystal. Package can be programmed in circuit. 1.8V to 5V operating voltage!

Documents:

Replaces: DEV-08846

Pricing

	377 in stock backorder allowed

$5.50	price
$4.95	10-99 (10% off)
$4.40	100+ (20% off)

	quantity

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Comments

36 comments

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	by Nicola +2.2 \| Apr 24, 2009 at 1:04am 0
ohh finally, i was waiting for this guy :)

	by wiggles +4.7 \| Apr 26, 2009 at 2:20pm 0
Can this be swapped for a 168 on an arduino duemilanove without any modifications?

	by wiggles +4.7 \| Apr 26, 2009 at 2:28pm +0.24
doh, it says in the description

	by jmjordan +2.6 \| May 22, 2009 at 11:01am 0
Can the internal resonator be used instead of an external clock with the Arduino bootloader?

	by Nate \| Aug 2, 2009 at 3:55pm
It really can't. The internal osc has a pretty sloppy tolerance(+/-10%!). In the olden days, Arduino bootloader running at 19200bps, you could use the internal osc and get it to work, off the shelf (no user calibration). But with the new, snappier 57600bps based Arduino boot loader (on this IC), you have to use an external osc.

	by domino14 +1.4 \| Aug 20, 2010 at 1:30pm 0
The internal oscillator isn't as bad as the specs say. I have used it with a 250000 baud Zigbee module several times with no problem. It can also be tuned. It has a lot of jitter, but not enough to matter.

	by Shifted +2.4 \| Sep 6, 2009 at 6:45pm 0
When will more of these be in stock?

	by Fuzzy +1 \| Dec 8, 2009 at 10:08pm 0
so...crystal vs ceramic resonators: any preference? Haven't done this stuff in awhile, can't remember what's used for what.

	by PresidentOfAwesomeness +0.42 \| Feb 20, 2010 at 2:16pm 0
I'm pretty sure that crystals are less stable than resonators, so I would just use the resonator.

	by EyeTic +1.9 \| Dec 17, 2009 at 3:54am +0.24
Any chance of restocking those b4 Free Day?

	by smartroad +1.6 \| Dec 27, 2009 at 2:24am 0
Second that! :D

	by tinynormous +1.2 \| Dec 29, 2009 at 2:03pm 0
Third that.

	by Clint- +1.3 \| Dec 30, 2009 at 4:57pm 0
fourth that. but doesn't it say that back ordered items are available on free day? maybe I am just imagining things.

	by jwm20 +1 \| Jan 5, 2010 at 8:27am 0
If these aren't in stock by Free Day, can they be backordered as part of a Free Day order? Would that incur extra shipping charges? Normally I wouldn't mind, but these are cheap enough that shipping could cost as much as the parts, and I might just want to wait until they could be part of a bigger non-Free Day order....

	by lostangel556 +2 \| Jan 7, 2010 at 5:47pm 0
Any chance of getting an SMD version of this chip? I want to make my own version of the arduino pro mini for an project so i can integrate everthing i need on the same board.

	by Quazar +10 \| Jan 25, 2010 at 12:42pm 0
It would be great if you offered a variant of this item with an Arduino Bootloader compiled for 20MHz.

sdcharle

+1.7

| Feb 28, 2010 at 3:46pm

I used the ITP tutorial for wiring up a breadboard Arduino (http://itp.nyu.edu/physcomp/Tutorials/ArduinoBreadboard) and I get behavior where it blinks once, but then pauses and blinks more and more rapidly, and then stops. I am going to wire up the FT232 breakout board next, but was a bit puzzled by the behavior at this checkpoint - is this the preloaded program or is the preloader program the plain old blink, and something getting wacked with the timing?

+1.2

| Mar 21, 2010 at 4:13pm

Exactly the situation I'm in. Used the ITP tutorial, built my own setup using the FT232R Breakout and am now wondering if the bootloader is messed up or if it's something else with my circuit. The LED does the single blink, speed-up-blink, stop, that you described. Also when trying to upload programs using the Arduino software I'm getting a 'not in sync' error. Waiting for the USBtinyISP to come in and I'm going to try starting from scratch and bootloading all new, but... I think I'm missing something. Did you ever resolve your issue?

	by 13 +1.2 \| Mar 23, 2010 at 9:12am 0
well I got the USBtinyISP and did a Burn Bootloader with the Arduino software. The LED now blinks @ the 1MHz I originally anticipated. Although I did get a "Done Burning Bootloader", I still got a lot of 'usb errors' in the status bar of the Arduino software. But as far as I can tell, I've made one small step in the right direction...

	by MichaelShimniok +1.4 \| Mar 30, 2010 at 11:33am 0
The blinking behavior you describe appears perfectly normal. My 328P does the same after I wired it onto a breadboard, and I've successfully loaded a sketch so I know all's well. I guess the bootloader blinks the LED a little differently than my other 328P based Arduino-ish setup. shrug --Michael

	by flimshaw +2 \| Mar 5, 2010 at 3:38pm 0
I see that this can you can drop this into Duemilanove, but can this be dropped into the Diecimila board without any modifications?

	by Pearce \| Mar 5, 2010 at 3:43pm
Yes, You can, I did that with mine

gearheadpyro

+1.3

| Mar 15, 2010 at 7:40pm

Can you buy just the ATmega 328 and burn the bootloader yourself? I have the Arduino program and it has an option to "burn bootloader". I'm very new to this so please forgive this if it's a stupid question.

I'm trying to make a printed circuit board that has an arduino (and much other stuff) all on it. I want the low cost of putting the chip on without using a Pro Mini, but this chip is still out of stock.

	by Lavalamp +1.4 \| Apr 28, 2010 at 7:43pm 0
I think you burn the bootloader on with a "burner thing"( Forgot the actual name) through the ICSP on the Duemilanove. But I'm new too. So get a second opinion. Good luck!

	by manray +2.5 \| Apr 8, 2010 at 7:28am 0
Could we get the eagle part for this?

	by calle +2.3 \| Apr 16, 2010 at 7:48am 0
think of the fact that you will need two 20nF capc if you chose to use the 16MHz crystal instead of the http://www.sparkfun.com/commerce/product_info.php?products_id=9420

NOI7734

+1.2

| Jun 15, 2010 at 6:13pm

actually its not 20nf caps, the best setup is to run 2 22pf caps from the crystal legs to ground, I read 20 nf somewhere and tried it, but it locked up the avr, fortunately when I found an accurate source of information and got the 22pf caps the avr and crystal were both still fine.

in short, you need 2 22pf caps, 1 22uf electrolytic cap (radial lead, axial lead wont work...that means it has to have an positive and negative, cant be non-polarized) 16mhz crystal, 5 volt voltage regulator, and a 10nf cap.

any questions see:
http://www.instructables.com/id/Perfboard-Hackduino-Arduino-compatible-circuit/

^I've done this it works perfect^

bjohnson777

+1.2

| Apr 27, 2010 at 5:30pm

Mine didn't seem to come with much of anything flashed onto it. It didn't blink the onboard LED of my Arduino Duemilanove like the original 328 did. I couldn't upload a sketch to it, either. I spent the extra dollar to avoid building the parallel ICSP cable for now... but ended up doing it anyways. After a manual bootloader flash, the LED started blinking like it should and would accept the sketch upload. The basic test seemed to run ok.

If anyone else decides to do the parallel cable under Debian/Lenny, there are a few quirks that are easy enough to work around.
Run: mknod /dev/parport0 c 99 0 ; chmod 666 /dev/parport0
Don't make the cable too long. Maybe use 100 ohm resistors instead of the higher value ones in the schematic.

	by zskatona +2.1 \| May 2, 2010 at 11:03pm 0
I got 3 of these about two weeks ago, but didn't try to use until now. I got the same symptoms: doesn't blink the led, can't upload a sketch. This is the first time this happens (manufactured 1007: 7th week of 2010).

	by RobertC. \| May 6, 2010 at 11:36am
If you need technical support, please direct it to techsupport@sparkfun.com. Thanks.

	by MrGoogfan +1 \| May 10, 2010 at 9:29pm 0
well, after reading the comments, idk if i want to buy one. the bootloaders seem screwed.

	by RobertC. \| May 12, 2010 at 9:38am
We had a small run where the boot loader didn't get properly installed. This issue has since been resolved. If everything works, you don't hear about it. If something doesn't work, you hear about it ten times over. Our mistake! It's fixed now though.

	by calle +2.3 \| May 12, 2010 at 4:40pm 0
A tip when using this: Use a good pcb to mount it on, since the crystal is very sensitive. It took me a long time to under stand that it was my prototype pcb that was leaking current to the resonator so it did not oscillate.

	by Single T \| May 13, 2010 at 7:56am
Thanks for the tip Calle. That is good advice!

	by JohnBoxall +1.7 \| Jun 13, 2010 at 12:11pm 0
This is very easy to use on a breadboard or in your own prototypes. I have written a simple tutorial on how to do so here: http://wp.me/pQmjR-rm

	by nebulous +3.4 \| Aug 24, 2010 at 10:10am 0
Is this a flash quadrupling drop in replacement for the Atmega8 in my old Arduino NG board, or will it only replace the 168?