ATMEL.001

ATMEL.001 Features

• Multi function Microcontroller module:
• Atmel AT89C2051 SBC (DIP20)
• Atmel AVR 
• On board components:
• Voltage requlator (TO-92)
• Memory EEPROM/RAM
• I2C Serial EEPROM (24CXX) or
• I2C Serial RAM
• Oscillator circuit
• Reset/brownout
• IO Drivers
• Optional RS-485 Driver
• Pull-up resistors
• Small "sea of holes" prototyping area
• DIP18 and smaller DIP packages
• 2 mounting holes
• SIMM30 edge connector
• Size: 1 x 3.5"
• Thickness: 50mil (1.27mm)
• Accepts:
• 30Pin Single row pin-headers
• IC type pins
• Reusable design:
• Can be used in many SIMMSTICK(tm) systems.

From: "Elvin Slavik" elvin@ozemail.com.au
To: sisuser@ip.co.za
Subject: ATMEL001 & Stuff
Date: Sat, 8 Mar 1997 22:57:35 +1100

Hi Folks,

I've been quiet for a while but though I'd pass on a few things I've
been up to.

I've built up the ATMEL.001 SimmStick board and have been having
success in using it with the DT001.

For those that haven't got into it yet the ATMEL.001 supports the
Atmel AT89C2051 which is a very groovy little 8051 compatible micro.
I've found it a good choice for some projects over the MicroChip stuff
because like the '84 it has a flash ROM (2K), but differs in that it
has an inbuilt UART that makes serial I/O very easy and reliable and
easily serial driver.

Two additional general purpose external interrupts, two in built
timers, built in comparator for simple A to D and a bunch of pins left
over for I/O, 128 bytes of RAM.. all in a 20 pin package. There is
tons of stuff out there for the 8051 family and so is a good choice
for a lot of projects. Unfortunatley it isn't as easy to program with
the DT001 as is the PIC stuff and I use a small serial port driver
programmer from Airborn electronics (See
http://www.airborn.com.au/Default.html ). Maybe someday the DT.002
will also support programming of the ATMEL chips. Hint hint :-)

There are pleny of public domain 8051 assemblers out there ont he net,
but as I prefer to program in C, I've found the Franklin C compiler
excellent, with a really good simulator/debugger. The demo version
allows you to generate code up to 4K (which is more than the AT89C2051
has anyway!!) which makes it a very cost effective choice (Free!!).
They compiler is fully functional as far has I've found so far!! You
can find it on http://www.fsinc.com/Prodeval.htm

As for docs on the Atmel instruction set, as it is 8051 compatible
almost any 8051 docs will do. I found that Temic have a full set of
docs on their web site (http://www.temic.com) covering hardware and
instruction set... very thorough and excellent quality.

The AT89C2051 may not be eveyone's cup of tea, but there is excellent
support for the 8051 out there (as is for the PIC too). The built in
UART and other features make it a better choice than the '84 for some
projects and the Flash ROM make it easy to re-program. I don't want to
start any arguments about 8051 VS PIC both have their strong points.
But the ATMEL stuff is definetly worth a look, especially since you
can easily use it with other boards on your DT001.

I'm currently using it to drive a TI TLV1543 11 channel A2D, the UART,
extra ROM&RAM and number of interrupts made it a better choice than
the PIC family for the project.

Regards. Elvin

Keep up the good work Antti..