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 (GPIO)
• 16 Analog Input Pins
• 12-bit ADC resolution (ADC)
• 15 PWM pins at 16-bit resolution (PWM)
• Dedicated USB port for programming and communications (USB)
• External JTAG interface (USB)
• 128 Flash and 20KB SRAM
• 64 Channel nested vector interrupt handler (including external interrupt on GPIO’s)
• Integrated SPI (SPI)
• Integrated I2C (I2C)
• 7 Channels of Direct Memory Access (DMA)
• 3 USART divices (USART)
• Four 4-channel Timers (Timers)
• Supplies up to 500mA @ 3.3v, with separate 250 mA digital and analog regulators
• Support for low power and sleep modes (<500uA)
• Dimensions are 2.05″x2.1″