MC3256 3-Axis Accelerometer GENERAL DESCRIPTION FEATURES Range, Sampling & Power The MC3256 is a low-noise, integrated digital output 3-axis accelerometer with a 2,4,8,12 or 16g ranges feature set optimized for cell phones and 8, 10 or 14-bit resolution consumer product motion sensing. 0.25 - 256 samples/sec Applications include user interface control, 50 - 130 A typical current gaming motion input, electronic compass tilt compensation for cell phones, game Event Detection controllers, remote controls and portable Low-noise architecture minimizes media products. false triggering Independent X, Y, Z Tap Low noise and low power are inherent in Simple System Integration the monolithic fabrication approach, where the MEMS accelerometer is integrated in a I2C interface, up to 400 kHz single-chip with the electronics integrated 3 3 1 mm 16-pin package Pin-compatible to MMA845x, circuit. ADXL346, LIS3DH, KXCJK, KXTIK accelerometers Single-chip 3D silicon MEMS In the MC3256 the internal sample rate can <200g / Hz noise be set from 0.25 to 256 samples / second. Specific tap or sample acquisition conditions can trigger an interrupt to a remote MCU. Alternatively, the device supports the reading of sample and event status via polling. Information furnished by MEMSIC is believed to be accurate and reliable. MEMSIC Semiconductor (Tianjin) Co., Ltd. However, no responsibility is assumed by MEMSIC for its use, or for any infringements of patents or other rights of third parties which may result Room 4-501, Financial Center, No. 158, West Third Road, from its use. No license is granted by implication or otherwise under any patent or patent rights of MEMSIC. Tianjin Airport Economic Zone, Tianjin, China, 300308 Tel: +86 022-59896226 www.memsic.com MEMSIC MC3256 APS-048-0027 v1.7 Page 1 of 45 Formal release date: 2020/08/01 TABLE OF CONTENTS 1 Order Information ............................................................................................................. 4 2 Functional Block Diagram ................................................................................................ 5 3 Packaging and Pin Description ........................................................................................ 6 3.1 Package Outline ................................................................................................................... 6 3.2 Package Orientation ............................................................................................................. 7 3.3 Pin Description ..................................................................................................................... 8 3.4 Typical Application Circuit .................................................................................................... 9 3.5 TAPE AND REEL ............................................................................................................... 10 4 Specifications ................................................................................................................. 12 4.1 Absolute Maximum Ratings ................................................................................................ 12 4.2 Sensor Characteristics ....................................................................................................... 13 4.3 Electrical and Timing Characteristics .................................................................................. 14 4.3.1 Electrical Power and Internal Characteristics ........................................................ 14 4.3.2 I2C Electrical Characteristics ................................................................................ 15 4.3.3 I2C Timing Characteristics .................................................................................... 16 5 General Operation ......................................................................................................... 17 5.1 Sensor Sampling ................................................................................................................ 17 5.2 Offset and Gain Calibration ................................................................................................ 17 5.3 Tap Detection ..................................................................................................................... 17 6 Operational States ......................................................................................................... 18 7 Operational State Flow .................................................................................................. 19 8 Interrupts ........................................................................................................................ 20 8.1 Enabling and Clearing Interrupts ........................................................................................ 20 8.2 ACQ INT Interrupt ............................................................................................................. 20 9 Sampling ........................................................................................................................ 21 9.1 Continuous Sampling ......................................................................................................... 21 10 I2C Interface .................................................................................................................. 22 10.1 Physical Interface ............................................................................................................... 22 10.2 Timing ................................................................................................................................ 23 10.3 I2C Message Format .......................................................................................................... 23 10.4 Watchdog Timer ................................................................................................................. 24 MEMSIC MC3256 APS-048-0027 v1.7 Page 2 of 45 Formal release date: 2020/08/01