MattairTech MT--D21E, Руководство пользователя, Страница: 5 / 39

MT-D21E User Guide
Board Features
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Atmel SAM D21E 32­pin ARM Cortex M0+ microcontroller
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ATSAMD21E17A (128KB) or ATSAMD21E18A (256KB)
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Up to 48MHz
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128KB or 256KB in­system self­programmable Flash
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16KB or 32KB SRAM Memory
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Onboard 3.3V, 250mA LDO regulator
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up to 16V DC input
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extremely low quiescent current (2.0uA typical)
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low dropout (525mV typical @ 250mA, 725mV max. @ 250mA)
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0.4% output tolerance typical
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Over­current and over­temperature protection
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Simple power source switching
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2 schottky barrier diodes (Vbus and Vin)
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Low voltage drop
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Reverse­polarity protection
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PTC resettable fuse (180mA hold / 400mA trip)
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Cortex Debug Header (10­pin, 50­mil)
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Can be used for device programming and debugging
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16MHz crystal (can use PLL for up to 48MHz cpu clock)
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32.768KHz crystal
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Blue Status LED (can be disconnected)
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Button A for general use (pin A27) with debouncing
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Button B configurable for reset or general use (pin A31) with debouncing
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Two 4.7Kohm resistors can be connected to pins A16 and A17 for use with I2C
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USB SAM­BA (CDC) bootloader (optional)
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Arduino compatible (use the Arduino IDE to upload)
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Bossa command line utility (Windows, Linux, limited OS X)
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Arduino 1.6.5+ compatible core (1.6.6 support now available)
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USB Mass Storage Device (MSD) bootloader (optional, see caveats)
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Mini USB connector
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ESD protection on USB D+ and D­ lines
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USB pins routed to header pins (for panel­mount USB connector)
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Powered by USB or external power source (up to 16V) on Vin
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Ferrite bead and 2 capacitors on analog supply
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Two capacitors each can be enabled for pins A3 and/or A4 for use with external references
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19 solder jumpers on PCB bottom for configuration flexibility
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All PORT pins routed to headers
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2 main headers are on 0.1” spacing (breadboard/perfboard mounting)
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Two 3mm mounting holes (~5mm pad)
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High­quality PCB with gold­plated finish
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Measures approx. 2.1” x 0.9” (52mm x 23mm) and 0.062” (1.6mm) thick.
July 11, 2016 5 http://www.mattairtech.com/