The MC3635 Evaluation Board Quick Start Guide and Demo GENERAL DESCRIPTION MC3635 FEATURES The MC3635 is an ultra-low power, low- Range, Sampling & Power noise, integrated digital output 3-axis 2, 4, 8, 12 or 16g ranges accelerometer with a feature set optimized 8, 10 or 12-bit resolution with FIFO for wearables and consumer product o 14-bit single samples motion sensing. Applications include Sample rate 14 - 1300 samples/sec wearable consumer products, IoT devices, Sample trigger via internal user interface control, gaming motion input, oscillator, clock pin or software electronic compass tilt compensation for command cell phones, game controllers, remote Sniff and Wake modes controls and portable media products. 0.4 A Sniff current 6Hz Separate or combined sniff/wake The EV3635A/B is a prebuilt circuit board Ultra-Low Power with 32 sample with MC3635 3-axes sensor. The MC3635 FIFO has internal sample rate from 14 to 1300 o 0.9 A typical current 25Hz samples / second and measures o 1.6 A typical current 50Hz acceleration with a wide usage range, from o 2.8 A typical current 100Hz +/-2g up to +/-16g, and 6-bit to 14-bit high o 36 A typical current 1300Hz precision ADC output, which is easy to fit on top of the microcontroller, such as an Simple System Integration Arduino. The accelerometer communicates I2C interface, up to 1 MHz via I2C/SPI and gives out motion detection or sample acquisition conditions to trigger SPI Interface, up to 8 MHz an interrupt toward an MCU. 1.6 1.6 0.94 mm 10-pin package Single-chip 3D silicon MEMS The sensor data is easily readable by Low noise to 2.3mgRMS connecting DVDD to 3.3V, GND to ground, and SCL/SDA pins to your Arduino I2C clock and data pin respectively. Download the MC3635 library from MEMSIC onto the board, run the example sketch, and then sensor data shortly comes out in raw data count and SI unit accelerometer measurements. An easy-to-use demonstration on EV3635A/B using the Arduino platform is included in this document. MEMSIC EV3635A+B APS-045-0018 v1.4 Page 1 of 19 Formal release date: 2020/08/12 TABLE OF CONTENTS 1 General Operation ........................................................................................................... 3 1.1 Pinouts ................................................................................................................................. 3 1.2 Power Pins ........................................................................................................................... 3 1.3 I2C Pins ............................................................................................................................... 4 1.4 SPI Pins ............................................................................................................................... 5 1.5 Interrupt Pins ........................................................................................................................ 5 2 Assembly and Test .......................................................................................................... 6 2.1 I2C Interface ........................................................................................................................ 6 2.2 SPI Interface ........................................................................................................................ 7 3 Demo ............................................................................................................................... 8 3.1 GET the Driver from MEMSIC .............................................................................................. 8 3.2 Load the Demo .................................................................................................................... 8 4 Library Reference .......................................................................................................... 11 4.1 Create MEMSIC MC36XX Object ...................................................................................... 11 4.2 Initialize and Configure Sensor ........................................................................................... 11 4.3 Set Range .......................................................................................................................... 11 4.4 Read Range ....................................................................................................................... 11 4.5 Set Resolution .................................................................................................................... 11 4.6 Read Resolution................................................................................................................. 12 4.7 Set CWake Sampling Rate ................................................................................................. 12 4.8 Read CWake Sampling Rate.............................................................................................. 12 4.9 Set Sniff Sampling Rate ..................................................................................................... 12 4.10 Read Sniff Sampling Rate .................................................................................................. 12 4.11 Config Sniff Mode ............................................................................................................... 12 4.12 Config Interrupt Mode ........................................................................................................ 13 4.13 Read Raw Count Data ....................................................................................................... 13 5 Schematics .................................................................................................................... 14 6 Bill of Materials .............................................................................................................. 16 7 Fabrication Print ............................................................................................................. 17 8 NOTE ............................................................................................................................. 18 9 Revision History ............................................................................................................. 19 MEMSIC EV3635A+B APS-045-0018 v1.4 Page 2 of 19 Formal release date: 2020/08/12