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.. _specs:
.. _specs-Technical-Specifications:
================================
Maple's Technical Specifications
================================
* STM32 F103RB: a **32-bit** ARM Cortex M3 microprocessor
* Clock Speed: **72 MHz**
* Operating Voltage: 3.3V
* Input Voltage (recommended): 3.0V-12V
* 39 Digital I/O Pins (:ref:`GPIO <gpio>`)
* **16 Analog** Input Pins (:ref:`ADC <adc>`)
* **15 PWM pins** at 16-bit resolution (:ref:`PWM <pwm>`)
* Dedicated **USB** port for programming and communications (:ref:`USB<usb>`)
* External **JTAG** interface (:ref:`USB <jtag>`)
* **128 Flash** and **20KB SRAM**
* 64 Channel nested vector interrupt handler (including external interrupt on GPIO’s)
* Integrated **SPI** (:ref:`SPI<spi>`)
* Integrated **I2C** (:ref:`I2C<i2c>`)
* 7 Channels of Direct Memory Access (DMA)
* 3 **USART** divices (:ref:`USART <usart>`)
* Four 4-channel Timers (:ref:`Timers <timers>`)
* Supplies up to 800mA @ 3.3v
* Support for low power and sleep modes (<500uA)
* Dimensions are 2.05″x2.1″
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