# Seeed Studio XIAO nRF52840 ## Description XIAO nRF52840 Breakout with Centered Accelerometer, Precision Mounting Holes, and Additional Battery Connector ## Project Details - **Owner:** ulasyalin - **Created:** 4/4/2026 - **Last Updated:** 4/4/2026 - **Visibility:** Public - **Outline Width:** 17.8mm - **Datasheet URL:** https://files.seeedstudio.com/wiki/XIAO-BLE/nRF52840_PS_v1.5.pdf - **Part Type:** Microcontroller - **Manufacturer Part Number:** 102010448 - **Board Center:** [0 mm, 0 mm] - **Outline Height:** 20.95mm - **System Architecture:** ```mermaid graph LR MCU[nRF52840 MCU] --> ACC[Accelerometer] MCU --> BATT[Battery Connector] MCU --> MOUNT[Mounting Holes] ``` - **Board Center:** [-0.05 mm, -0.075 mm] - **Purchase Url:** https://www.seeedstudio.com/Seeed-XIAO-BLE-nRF52840-p-5201.html - **Manufacturer Name:** Seeed Studio ## Key Components ### H1 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill~7o1.md) - Role Details: Mounting hole for enclosure shell, 3.2 mm drill diameter, plated through-hole, 0.5 mm copper clearance - Role: Mechanical - Manufacturer Part Number: MountingHole_Pad **Pins:** - 1 ### H2 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill~7o1.md) - Manufacturer Part Number: MountingHole_Pad - Role Details: Mounting hole for enclosure shell, 3.2 mm drill diameter, plated through-hole, 0.5 mm copper clearance - Role: Mechanical **Pins:** - 1 ### H3 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill~7o1.md) - Role: Mechanical - Manufacturer Part Number: MountingHole_Pad - Role Details: Mounting hole for enclosure shell, 3.2 mm drill diameter, plated through-hole, 0.5 mm copper clearance **Pins:** - 1 ### H4 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill~7o1.md) - Role Details: Mounting hole for enclosure shell, 3.2 mm drill diameter, plated through-hole, 0.5 mm copper clearance - Role: Mechanical - Manufacturer Part Number: MountingHole_Pad **Pins:** - 1 ### H5 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill~7o1.md) - Role Details: Mounting hole for enclosure shell, 3.2 mm drill diameter, plated through-hole, 0.5 mm copper clearance - Manufacturer Part Number: MountingHole_Pad - Role: Mechanical **Pins:** - 1 ### H6 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill~7o1.md) - Role Details: Mounting hole for enclosure shell, 3.2 mm drill diameter, plated through-hole, 0.5 mm copper clearance - Manufacturer Part Number: MountingHole_Pad - Role: Mechanical **Pins:** - 1 ### H7 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill~7o1.md) - Role Details: Mounting hole for enclosure shell, 3.2 mm drill diameter, plated through-hole, 0.5 mm copper clearance - Role: Mechanical - Manufacturer Part Number: MountingHole_Pad **Pins:** - 1 ### H8 — [MountingHole 7.4mm Pad 3.2mm drill](https://www.flux.ai/adrian95/mountinghole-74mm-pad-32mm-drill~7o1.md) - Manufacturer Part Number: MountingHole_Pad - Role: Mechanical - Role Details: Mounting hole for enclosure shell, 3.2 mm drill diameter, plated through-hole, 0.5 mm copper clearance **Pins:** - 1 ### J1 — [B2B-PH-K-S(LF)(SN)](https://www.flux.ai/jecstronic/b2b-ph-k-slfsn~nss.md) - Role Details: Battery connector (PH2.0 2-pin) - Role: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Name: JST Sales America - Manufacturer Part Number: B2B-PH-K-S(LF)(SN) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151524_JST-Sales-America-B2B-PH-K-S-LF-SN_C131337.pdf **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] ### U2 — [LIS3DH](https://www.flux.ai/kicad-part-library/lis3dh~ecw.md) - locked: true - position: [0 mm, 0 mm] - Role Details: 3-axis accelerometer - Manufacturer Part Number: LIS3DH - Datasheet URL: https://www.st.com/resource/en/datasheet/cd00274221.pdf - Role: Sensor - Package or Case Code: LGA-16_3x3mm_P0.5mm_LayoutBorder3x5y **Pins:** - ADC1 [pin 16] - ADC2 [pin 15] - ADC3 [pin 13] - CS [pin 8] - GND [pin 12] - GND [pin 5] - GND [pin 10] - INT1 [pin 11] - INT2 [pin 9] - NC [pin 3] - NC [pin 2] - SDI [pin 6] - SDO [pin 7] - SPC [pin 4] - VDD [pin 14] - VDD_IO [pin 1] ### U2 — [LIS3DH](https://www.flux.ai/kicad-part-library/lis3dh~ecw.md) - Package or Case Code: LGA-16_3x3mm_P0.5mm_LayoutBorder3x5y - Datasheet URL: https://www.st.com/resource/en/datasheet/cd00274221.pdf - Role Details: 3-axis accelerometer - Role: Sensor - Manufacturer Part Number: LIS3DH **Pins:** - ADC1 [pin 16] - ADC2 [pin 15] - ADC3 [pin 13] - CS [pin 8] - GND [pin 12] - GND [pin 5] - GND [pin 10] - INT1 [pin 11] - INT2 [pin 9] - NC [pin 3] - NC [pin 2] - SDI [pin 6] - SDO [pin 7] - SPC [pin 4] - VDD [pin 14] - VDD_IO [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ulasyalin/seeed-studio-xiao-nrf52840~ns](https://www.flux.ai/ulasyalin/seeed-studio-xiao-nrf52840~ns).* --- *Generated from [https://www.flux.ai/ulasyalin/seeed-studio-xiao-nrf52840~ns](https://www.flux.ai/ulasyalin/seeed-studio-xiao-nrf52840~ns)*