2466

Page 1 of 3 ARDUINO / BOARDS Adafruit METRO 328 without Headers ATmega328 PRODUCT ID: 2466 Page 2 of 3 DESCRIPTION - We sure love the ATmega328 here at Adafruit, and we use them a lot for our own projects. The processor has plenty of GPIO, Analog inputs, hardware UART SPI and I2C, timers and PWM galore - just enough for most simple projects. When we need to go small, we use a Pro Trinket 3V or 5V, but when size isn't as much of a concern, and a USB-serial converter is required, we reach for an Adafruit METRO. METRO is the culmination of years of playing with AVRs: we wanted to make a development board that is easy to use and is hacker friendly. • ATmega328 brains - This popular chip has 32KB of flash (1/2 K is reserved for the bootloader), 2KB of RAM, clocked at 16MHz • Power the METRO with 7-9V polarity protected DC or the micro USB connector to any 5V USB source. The 2.1mm DC jack has an on/off switch next to it so you can turn off your setup easily. The METRO will automagically switch between USB and DC. • METRO has 20 GPIO pins, 6 of which are Analog in as well, and 2 of which are reserved for the USB-serial converter. There's also 6 PWMs available on 3 timers (1 x 16-bit, 2 x 8-bit). There's a hardware SPI port, hardware I2C port and hardware UART to USB. • GPIO Logic level is 5V but by cutting and soldering closed a jumper, you can easily convert it to 3.3V logic • USB to Serial converter, there's a hardware USB to Serial converter that can be used by any computer to listen/send data to the METRO, and can also be used to launch and update code via the bootloader • Four indicator LEDs, on the front edge of the PCB, for easy debugging. One green power LED, two RX/TX LEDs for the UART, and a red LED connected to pin PB5 • Easy reprogramming, comes pre-loaded with the Optiboot bootloader, which is supported by avrdude and only uses 512 bytes. • Beautiful styling by PaintYourDragon and Bruce Yan, in Adafruit Black with gold plated pads. • Works with all Adafruit designed shields! Page 3 of 3 This version of the METRO 328 comes as a fully assembled and tested development board but without any headers attached. We do include some through-hole headers that you can solder on if you like, or you can solder wires or header directly to the breakout pads. We also include 4 rubber bumpers to keep it from slipping off your desk. Don't forget to grab & install the FTDI VCP drivers from FTDI to make the COM/Serial port show up right! http://www.adafruit.com/products/2466 7/21/2015