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| 1 | +.. _x-nucleo-iks4a1: |
| 2 | + |
| 3 | +X-NUCLEO-IKS4A1: MEMS Inertial and Environmental Multi sensor shield |
| 4 | +#################################################################### |
| 5 | + |
| 6 | +Overview |
| 7 | +******** |
| 8 | +The X-NUCLEO-IKS4A1 is a motion MEMS and environmental sensor expansion board |
| 9 | +for the STM32 Nucleo. It is equipped with Arduino UNO R3 connector layout, and |
| 10 | +allows application development with features like sensor HUB (LSM6DSO16IS and |
| 11 | +LSM6DSV16X), camera module integration and Qvar touch/swipe gestures (thanks to |
| 12 | +the equipped electrode). |
| 13 | + |
| 14 | +.. image:: img/x-nucleo-iks4a1.jpg |
| 15 | + :align: center |
| 16 | + :alt: X-NUCLEO-IKS4A1 |
| 17 | + |
| 18 | +More general information about the board can be found at the |
| 19 | +`X-NUCLEO-IKS4A1 website`_. |
| 20 | + |
| 21 | +Hardware Description |
| 22 | +******************** |
| 23 | + |
| 24 | +X-NUCLEO-IKS4A1 provides the following key features: |
| 25 | + |
| 26 | + - LSM6DSO16IS: MEMS 3D accelerometer (±2/±4/±8/±16 g) + 3D gyroscope |
| 27 | + (±125/±250/±500/±1000/±2000 dps) with ISPU (Intelligent Processing Unit) |
| 28 | + - LIS2MDL: MEMS 3D magnetometer (±50 gauss) |
| 29 | + - LIS2DUXS12: Ultra low-power MEMS 3D accelerometer (±2/±4/±8/±16 g) with |
| 30 | + Qvar, AI, & anti-aliasing |
| 31 | + - LPS22DF: Low-power and high-precision MEMS pressure sensor, 260-1260 hPa |
| 32 | + absolute digital output barometer |
| 33 | + - SHT40AD1B: High-accuracy, ultra-low-power relative humidity and temperature |
| 34 | + sensor (by Sensirion) |
| 35 | + - STTS22H: Low-voltage, ultralow-power, 0.5 °C accuracy temperature sensor |
| 36 | + (–40 °C to +125 °C) |
| 37 | + - LSM6DSV16X: MEMS 3D accelerometer (±2/±4/±8/±16 g) + 3D gyroscope |
| 38 | + (±125/±250/±500/±1000/±2000/±4000 dps) with embedded sensor fusion, AI, Qvar |
| 39 | + - DIL 24-pin socket available for additional MEMS adapters and other sensors |
| 40 | + - Free comprehensive development firmware library and example for all sensors |
| 41 | + compatible with STM32Cube firmware |
| 42 | + - Equipped with Qvar touch/swipe electrode |
| 43 | + - I²C sensor hub features on LSM6DSO and LSM6DSV16X available |
| 44 | + - MIPI I3C® compatibility for communication with LIS2DUXS12, LSM6DSV16X and |
| 45 | + LPS22DF |
| 46 | + - Compatible with STM32 Nucleo boards |
| 47 | + - Equipped with Arduino UNO R3 connector |
| 48 | + - Equipped with industrial connector for IR sensor (STHS34PF80) application |
| 49 | + development. It can be connected at the same time of external MEMS through |
| 50 | + DIL24 adapter |
| 51 | + - Available interface for external camera module applications coupled with |
| 52 | + LSM6DSV16X through aux SPI (3/4 w) |
| 53 | + - RoHS compliant |
| 54 | + - WEEE compliant |
| 55 | + - UKCA compliant |
| 56 | + |
| 57 | +Hardware Configuration |
| 58 | +********************** |
| 59 | + |
| 60 | +X-NUCLEO-IKS4A1 board can be configured in five different modes, which can be |
| 61 | +selected through J4 and J5 jumpers. Additional information about X-NUCLEO-IKS4A1 |
| 62 | +configuration modes and how sensors are connected together can be found in the |
| 63 | +`X-NUCLEO-IKS4A1 user manual`_ |
| 64 | + |
| 65 | +.. _x-nucleo-iks4a1-mode-1: |
| 66 | + |
| 67 | +Mode 1: Standard Mode |
| 68 | +===================== |
| 69 | + |
| 70 | +In standard I2C mode, all devices are connected to an external main board via the |
| 71 | +same I2C bus. |
| 72 | + |
| 73 | +The board configuration is: |
| 74 | + |
| 75 | + - J4: 1-2, 11-12 (STM_SDA = SENS_SDA, HUB_SDx = GND) |
| 76 | + - J5: 1-2, 11-12 (STM_SCL = SENS_SCL, HUB_SCx = GND) |
| 77 | + |
| 78 | +.. _x-nucleo-iks4a1-mode-2: |
| 79 | + |
| 80 | +Mode 2: LSM6DSO16IS SensorHub Mode (SHUB2) |
| 81 | +========================================== |
| 82 | + |
| 83 | +In this sensor hub I2C mode, it is possible to power-up the 6-axes IMU |
| 84 | +(Inertial Measurement Unit) functionalities by collecting external data |
| 85 | +through a direct control of the on-board environmental sensors (temperature, |
| 86 | +pressure and magnetometer) and external sensor (DIL24) through the auxiliary |
| 87 | +I2Cz bus "SENS_I2C". LSM6DSV16X, LIS2DUXS12 and SHT40AD1B remains connected |
| 88 | +to the main bus "uC_I2C" coming from the external board. |
| 89 | + |
| 90 | +The board configuration is: |
| 91 | + |
| 92 | + - J4: 7-8 (HUB2_SDx = SENS_SDA) |
| 93 | + - J5: 7-8 (HUB2_SCx = SENS_SCL) |
| 94 | + |
| 95 | +.. _x-nucleo-iks4a1-mode-3: |
| 96 | + |
| 97 | +Mode 3: LSM6DSV16X SensorHub Mode (SHUB1) |
| 98 | +========================================= |
| 99 | + |
| 100 | +In this sensor hub, it is possible to power-up the 6-axes IMU (Inertial |
| 101 | +Measurement Unit) functionalities by collecting external data through |
| 102 | +a direct control of the on-board environmental sensors (temperature, |
| 103 | +pressure and magnetometer) and external sensor (DIL24) through the auxiliary |
| 104 | +I2C bus "SENS_I2C". LSM6DSO16IS, LIS2DUXS12 and SHT40AD1B remains connected |
| 105 | +to the main bus "uC_I2C" coming from the external board. |
| 106 | + |
| 107 | +The board configuration is: |
| 108 | + |
| 109 | + - J4: 5-6 (HUB1_SDx = SENS_SDA) |
| 110 | + - J5: 5-6 (HUB1_SDx = SENS_SDA) |
| 111 | + |
| 112 | +Mode 4: DIL24 SensorHub Mode |
| 113 | +============================ |
| 114 | + |
| 115 | +In case a sensor with sensor hub embedded functionality is mounted to the |
| 116 | +board through DIL24 adapter, it is possible to exploit this functionality |
| 117 | +as for LSM6DSO16IS and the LSM6DSV16X. In this configuration, may be necessary |
| 118 | +to connect the DIL24 to the external board through SPI lines in order to |
| 119 | +avoid an address conflict on I2C bus with the LSM6DSO16IS and the LSM6DSV16X. |
| 120 | +This is done by changing the SBx configuration. |
| 121 | + |
| 122 | +The board configuration is: |
| 123 | + |
| 124 | + - J4: 9-10 (DIL_SDx = SENS_SDA) |
| 125 | + - J5: 9-10 (DIL_SDx = SENS_SDA) |
| 126 | + |
| 127 | +Mode 5: LSM6DSO16IS as Qvar controller |
| 128 | +====================================== |
| 129 | + |
| 130 | +In this configuration, it is possible to use the equipped Qvar swipe electrode |
| 131 | +(by plugging it on JP6 and JP7 connectors) through the LSM6DSO16IS. |
| 132 | + |
| 133 | +The board configuration is: |
| 134 | + |
| 135 | + - J4: 3-4 (HUB1_SDx = QVAR1) |
| 136 | + - J5: 3-4 (HUB1_Scx = QVAR2) |
| 137 | + |
| 138 | +Devicetree Overlays |
| 139 | +******************* |
| 140 | + |
| 141 | +There are three predefined DT overlays in the board: |
| 142 | + |
| 143 | +- :zephyr_file:`boards/shields/x_nucleo_iks4a1/x_nucleo_iks4a1.overlay` |
| 144 | + This overlay describes sensor connections (and matching h/w configuration to be done) |
| 145 | + as explained in Standard Mode (:ref:`x-nucleo-iks4a1-mode-1`) |
| 146 | +- :zephyr_file:`boards/shields/x_nucleo_iks4a1/x_nucleo_iks4a1_shub1.overlay` |
| 147 | + This overlay describes sensor connections (and matching h/w configuration to be done) |
| 148 | + as explained in SHUB1 Mode (:ref:`x-nucleo-iks4a1-mode-3`) |
| 149 | +- :zephyr_file:`boards/shields/x_nucleo_iks4a1/x_nucleo_iks4a1_shub2.overlay` |
| 150 | + This overlay describes sensor connections (and matching h/w configuration to be done) |
| 151 | + as explained in SHUB2 Mode (:ref:`x-nucleo-iks4a1-mode-2`) |
| 152 | + |
| 153 | +.. _X-NUCLEO-IKS4A1 website: |
| 154 | + http://www.st.com/en/ecosystems/x-nucleo-iks4a1.html |
| 155 | + |
| 156 | +.. _X-NUCLEO-IKS4A1 user manual: |
| 157 | + https://www.st.com/resource/en/user_manual/um3239-getting-started-with-the-xnucleoiks4a1-motion-mems-and-environmental-sensor-expansion-board-for-stm32-nucleo-stmicroelectronics.pdf |
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