mega1281 products

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I see that the mega1281 is in stock at distributors.

Looking for plug-and-play small PCB modules using the '1281, such as ETT's Stamp, I have found only one - but it's intended for robots/motor control. I'm looking for a simple PCB with at 1281 and, ideally, RS232 or USB

Anyone know of such?

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None, right now. You only can try to buy one with ATmega128, and replace it by ATmega1281.

Or you can buy some commercial product that uses it, and hack it ;). I know at least of (an expensive) one...

Hey, now I just remember that probably some Atmel's ZigBee dev boards have it, but I'm not shure.

Guillem.
"Common sense is the least common of the senses" Anonymous.

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Guillem.
"Common sense is the least common of the senses" Anonymous.

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Do you mean '1281 or '1280? I don't think there are any significant extra USARTs or the like that would make the pinout different from a '128. ISP pins are the same. So you should be able to use just about any suitable Mega64 or Mega128 setup. Replace the CPU or start with the bare board.

Lee

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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I want a low cost board with the '1281 because it has 8KB of RAM and I need than increase versus the '1280 to save using external RAM.

I guess I could take one of my ETT mega128 "stamp" boards and try to desolder-resolder. Exceeds my skills and tools, though. Moreover, I want a bunch of these.

The '1281 has been availble for some time; wish it was within some products like ETT's.

(I do have some Atmel 802.15.4 boards; maybe they do have the '1281, but I don't need '15.4 in this project).

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Quote:
I want a low cost board with the '1281 because it has 8KB of RAM and I need than increase versus the '1280 to save using external RAM.

OK, I'll bite. [byte? kb?]

Table 3-1. Configuration Summary
Device Flash EEPROM RAM General Purpose I/O pins  16 bits resolution PWM channels  Serial USARTs  ADC Channels
ATmega640 64KB 4KB 8KB 86 12 4 16
ATmega1280 128KB 4KB 8KB 86 12 4 16
ATmega1281 128KB 4KB 8KB 54 6 2 8
ATmega2560 256KB 4KB 8KB 86 12 4 16
ATmega2561 256KB 4KB 8KB 54 6 2 8

Now, the table may not line up correctly but according to my rev. L datasheet all the devices in the '640 family have the same amount of SRAM.

Lee

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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theusch wrote:
Quote:
I want a low cost board with the '1281 because it has 8KB of RAM and I need than increase versus the '1280 to save using external RAM.

OK, I'll bite. [byte? kb?]

Table 3-1. Configuration Summary
Device Flash EEPROM RAM General Purpose I/O pins  16 bits resolution PWM channels  Serial USARTs  ADC Channels
ATmega640 64KB 4KB 8KB 86 12 4 16
ATmega1280 128KB 4KB 8KB 86 12 4 16
ATmega1281 128KB 4KB 8KB 54 6 2 8
ATmega2560 256KB 4KB 8KB 86 12 4 16
ATmega2561 256KB 4KB 8KB 54 6 2 8

Now, the table may not line up correctly but according to my rev. L datasheet all the devices in the '640 family have the same amount of SRAM.

Lee

Yeah, but! Need big Flash and 8KB RAM.
Flash filled up with HTML objects. Need more RAM due to having HTTP, FTP, SMTP, maybe TELNET all going at once - up to 4 sockets active concurrently. Yes, I'm pushing it with an 8-bitter, but that's the point: cheap!

I should look for a low cost 2561 product, too.

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I had used M1281 as a drop in replacement for M128 where I needed 8KB of RAM. Not fully pin compatible, Pin 1 is different, and some minor changes (Timer0 and Timer2 swapped), but porting requires less than 2 days.

Guillem.
"Common sense is the least common of the senses" Anonymous.

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Quote:

Yeah, but! Need big Flash and 8KB RAM.

OK--but '1280 & '1281 have exactly the same memory sizes.
Quote:

I want a low cost board with the '1281 because it has 8KB of RAM and I need than increase versus the '1280 to save using external RAM.

???

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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Morning Gents. I've been trying to talk the boss into making a 1280 bd to sell that has 4 db9s, and 16 a/ds. If we could reach sort of concensus on form factors (3" x 5"?), io headers (2x5 hdr per port? 8 ios and 5v and gnd?), kit options (mega1280 and xtal soldered on), etc. The big deal is Return On Investment. All the Non Recurring Engineering of bd layout has to amortize over number of bds sold. So lets say it cost $1000 to run 100 bds. There might be 3 dash numbers.... -11 is a kit with bd and parts, -12 might be a bare bones bd, -13 a fully populated bd. Whats the range of prices here? $50, $60, $70? Need to make at least $10 per bd to recoup cost with a run of 100. No one thinks you could sell 1000 of these do you?

Imagecraft compiler user

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theusch wrote:
Quote:

Yeah, but! Need big Flash and 8KB RAM.

OK--but '1280 & '1281 have exactly the same memory sizes.
Quote:

I want a low cost board with the '1281 because it has 8KB of RAM and I need than increase versus the '1280 to save using external RAM.

???

Ah so. Mega128 = 4KB RAM but mega1280 et al have 8KB

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Forgive me for bumping this up, but I hope I can get a little feedback from a couple of folks about the sales potential for a mega1280 board and the features it should have.... Actually, the boss said get an order for 50 and he'd lay it out.

Imagecraft compiler user

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mega1281 might be more popular - less often an overkill as compared to the 1280

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Sorry Bob,
Bascom doesn't support it yet, otherwise I'd be in for a couple.

JC

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Maybe that's the gimmick. Bd with 16ch a/d, 4 rs232s, and a special version of bascom?

Imagecraft compiler user