ARDUINO ZERO Board (ABX00003) -- BRAND NEW, Ship from USA

Description

Microcontroller
ATSAMD21G18, 32-Bit ARM Cortex M0+
Operating Voltage
3.3V
Digital I/O Pins
20
PWM Pins
All but pins 2 and 7
UART
2 (Native and Programming)
Analog Input Pins
6, 12-bit ADC channels
Analog Output Pins
1, 10-bit DAC
External Interrupts
All pins except pin 4
DC Current per I/O Pin
7 mA
Flash Memory
256 KB
SRAM
32 KB
EEPROM
None. See documentation
LED_BUILTIN
13
Clock Speed
48 MHz
Length
68 mm
Width
53 mm
Weight
12 gr.
ARM Core Benefits
The Zero has a 32-bit ARM core that can outperform typical 8-bit microcontroller boards. The most significant differences are:
32-bit core that allows operations on 4 byte wide data within a single CPU clock.
CPU Clock at 48MHz
12 channels DMA controller that can relieve the CPU from doing memory intensive tasks
32 bit Real Time Counter (RTC) with clock/calendar function
32 bit CRC generator
Two-channel Inter IC Sound (I2S) interface
Peripheral Touch Controller (PTC)
Memory
The SAMD21 has 256 KB Flash Memory. It also has 32 KB of SRAM and up to 16 KB of EEPROM by emulation.
Input and Output
Each of the 20 general purpose I/O pins on the Zero can be used for digital input or digital output using pinMode(), digitalWrite(), and digitalRead() functions. Pins that can be used for PWM output are: 3, 4, 5, 6, 8, 9, 10, 11, 12, 13 using analogWrite() function. All pins operate at 3.3 volts. Each pin can source or sink a maximum of 7 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms.
Programming
Uploading sketches to the SAMD21 is different from the AVR microcontrollers found in other Arduino & Genuino boards.
Either USB port can be used for programming the board, although using the Programming port is recommended due to the way the erasing of the chip is handled