LSM6DS3

@@ -0,0 +1,58 @@+# LSM6DS3++**STMicroelectronics** · 6-axis IMU (accel + gyro) · LGA-14++A 6-axis inertial measurement unit in a 3 x 2.5 mm LGA-14, combining a 3D accelerometer and 3D gyroscope in one package (ST's iNEMO line). The accelerometer covers plus/minus 2 to 16 g and the gyroscope plus/minus 125 to 2000 dps, both read over I2C or SPI, with a 4 KB smart FIFO that buffers samples so the host can sleep between reads. On-chip embedded functions (pedometer, step detector and counter, tilt, and significant-motion) offload always-on motion tracking, and two interrupt pins signal events. It is a low-power staple for wearables, drones, game controllers, and gesture input. This page is sourced from the current LSM6DS3TR-C datasheet. Runs 1.71-3.6 V.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | SDO/SA0 | bidirectional | SPI 4-wire serial data output (SDO) when SPI is selected. In I²C mode this pin sets the least significant bit of the 7-bit device slave address (SA0), giving two selectable I²C addresses on a single bus. |+| 2 | SDx | bidirectional | Mode 1: not used, must be tied to VDDIO or GND. Mode 2: I²C master serial data (MSDA) for the built-in sensor hub connecting external MEMS peripherals (magnetometer, etc.). |+| 3 | SCx | bidirectional | Mode 1: not used, must be tied to VDDIO or GND. Mode 2: I²C master serial clock (MSCL) for the built-in sensor hub connecting external MEMS peripherals. |+| 4 | INT1 | output | Programmable interrupt 1 output. Routes data-ready, FIFO, wake-up, free-fall, tap/double-tap, 6D/4D orientation, tilt, step-detector, significant-motion and other embedded-function events (mapping configured via INT1_CTRL / MD1_CFG). |+| 5 | VDDIO | power_in | Independent I/O supply pin (1.62 V typical, 1.71 V to 3.6 V analog VDD range allows level-shifted digital rails). A 100 nF filter capacitor is recommended. |+| 6 | GND | power_in | 0 V ground return. Both GND pins (6 and 7) must be tied to the board ground plane. |+| 7 | GND | power_in | 0 V ground return. Both GND pins (6 and 7) must be tied to the board ground plane. |+| 8 | VDD | power_in | Main analog supply, 1.71 V to 3.6 V. A 100 nF filter capacitor is recommended close to the pin. |+| 9 | INT2 | bidirectional | Programmable interrupt 2 output / data-enable (DEN) input used to timestamp external events into the FIFO. In Mode 2 this pin can alternatively act as the I²C master external synchronization signal (MDRDY) indicating a new sample from a sensor-hub slave. |+| 10 | NC | unconnected | No internal connection. Leave electrically unconnected but solder to PCB for mechanical support. |+| 11 | NC | unconnected | No internal connection. Leave electrically unconnected but solder to PCB for mechanical support. |+| 12 | CS | input | I²C / SPI mode selection and SPI chip-select. CS = 1 selects I²C mode (SPI idle); CS = 0 enables SPI communication (I²C disabled). Must be driven high or tied to VDDIO if only I²C is used. |+| 13 | SCL/SPC | input | I²C serial clock (SCL) when I²C is selected, or SPI serial port clock (SPC) when SPI is selected. Muxed between the two host protocols by the CS pin. |+| 14 | SDA/SDI/SDO | bidirectional | I²C serial data (SDA) in I²C mode; SPI 4-wire serial data input (SDI) in SPI mode; SPI 3-wire bidirectional serial data (SDO) when SIM = 1 (3-wire SPI). Function selected by CS and SIM configuration. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | 6-axis IMU (accel + gyro) |+| Accelerometer | ±2/±4/±8/±16 g |+| Gyroscope | ±125 to ±2000 dps |+| Interface | I2C + SPI |+| FIFO | 4 KB smart FIFO |+| Embedded | pedometer, tilt, significant-motion |+| Supply voltage | 1.71-3.6 V |+| Package | LGA-14 (3 x 2.5 mm) |++## Ordering variants++- `LSM6DS3TR-C (LGA-14)`+- `LSM6DS3 (LGA-14)`++## CAD (KiCad official)++- Symbol: `Sensor_Motion:LSM6DS3`+- Footprint: `Package_LGA:LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4y`+- 3D model: LGA-14 (KiCad packages3D)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/lsm6ds3tr-c.pdf) (115 pp, sha256 `251737db70e3b6cd`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/lsm6ds3-datasheet.pdf)

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