I am considering purchasing the Arduino Micro in large part because I need a small footprint for my project. My application will need to make use of the SDA and SCL pins as well as external interupts and will have an XBee radio on board (using pins 0 and 1). Can the Micro handle all this? It appears that the SCL and SDA pins (2 and 3) are the same pins used for the external interrupt pins. Does the Micro have SCL and SDA capability on any of the analog pins?
Thanks.
Arduino Micro TWI pin usage
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- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: Arduino Micro TWI pin usage
I believe it is possible to use software I2C on the Micro.
- dennisma
- Posts: 31
- Joined: Fri Feb 01, 2013 5:39 pm
Re: Arduino Micro TWI pin usage
If your heart is not set on the Micro you could use the Nano or the Mini. Both have a smaller footprint than the Micro
The Mini is quite small but requires an FTDI to program (not a big deal). I2C pins (A4&A5) stick out on top of the chip and can be attached with two female wires. It comes in both a 3.3v and 5v model. The 5v however lacks a 3.3v output (a gotcha I found out too late).
Here is a size comparison with the Micro on a breadboard
The Mini is quite small but requires an FTDI to program (not a big deal). I2C pins (A4&A5) stick out on top of the chip and can be attached with two female wires. It comes in both a 3.3v and 5v model. The 5v however lacks a 3.3v output (a gotcha I found out too late).
Here is a size comparison with the Micro on a breadboard
Please be positive and constructive with your questions and comments.