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LeafLabs Maple solderpad

An Arduino-compatible microcontroller board with a 72MHz 32bit ARM Cortex M3

leaflabs.com/devices/maple/

Recent activity:

  • 9600 pushed6 years ago
  • psd pushed6 years ago
  • psd pushed6 years ago
  • 9600 pushed6 years ago
  • 9600 pushed6 years ago

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Description

The LeafLabs Maple is a microcontroller board based on the STM32F103RB microprocessor. The Maple runs at a maximum of 72 MHz, has 39 digital input/output pins, 16 analog inputs, native full speed USB, 3 USARTs (hardware serial ports), integrated SPI/I2C support, a power jack, and a reset button. Maple is programmable over USB via our provided DFU bootloader, no extra hardware required! Users can also program the onboard program flash via external JTAG interface. Maple offers security support for read/write protected addresses, as well as User and Handler processor modes. It has a real-time sysTick, useful for a real time OS or any timing senstitive applications. Four built-in 16-bit timers will help you here as well. Maple can be powered via USB, a wall adapter, or it can run off of a rechargeable LiPo battery (see below for more info).

For those of us who love and are familiar with Arduino, Maple is offered in an Arduino-compatible format, complete with Arduino pin layouts and programming environment.

Note: the photo, schematic and board layout displayed are for Maple revision 5.

Schematic

Board

Bill of Materials

Designator Value Description
BAR POWER_JACKPTH Power Jack
BUT
C1 33pF Capacitor
C2 33pF Capacitor
C3 1uF Capacitor
C4 22uF POLARIZED CAPACITOR, European symbol
C5 1uF Capacitor
C6 1uF Capacitor
C7 1uF Capacitor
C8 1uF Capacitor
C9 47pF Capacitor
C10 47pF Capacitor
C11 1uF Capacitor
C12 22uF POLARIZED CAPACITOR, European symbol
C13 22uF POLARIZED CAPACITOR, European symbol
D1 Blue LEDs
D2 DIODE
D3 Red LEDs
D4 Green LEDs
IC1 BQ24010DRCA
IC2 3.3V-VREG-DIGITAL
IC3 3.3V-VREG-ANALOG
J1-A Header 8
J1-B
J2 Header 6
J3-A Header 8
J3-B
J4 POWER Header 6
JP1 Header 2
JTAG PIN HEADER
LIPO LiPo Header 2
OSC 8MHz Crystals
PWR PIN HEADER
Q2 Transistor NPN
Q3 Transistor NPN
R1 1k Resistor
R2 10k Resistor
R3 1k Resistor
R4 10k Resistor
R5 1k Resistor
R6 1k Resistor
R7 1.5k Resistor
R8 36k Resistor
R9 10k Resistor
R10 47k Resistor
R12 1k Resistor
R13 22 Resistor
R14 22 Resistor
R15 1.5k Resistor
R16 1.5k Resistor
R18 1k Resistor
R19 1k Resistor
R20 1k Resistor
R22 10k Resistor
R23 10k Resistor
RESET
RTC M02
SV1 PIN HEADER
UC1 STM32F103
X1 USBSMD USB Connectors

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This project is © LeafLabs, LLC, and is published under the terms of the Creative Commons Attribution-ShareAlike 3.0 Unported licence.