# Exuberant Fuchsia Battle Mech c467 e77d b973 ## Description Seeed XIAO ESP32-C6 microSD Carrier Board ## Project Details - **Owner:** saiko1992 - **Created:** 3/17/2026 - **Last Updated:** 3/17/2026 - **Visibility:** Public - **RF Antenna Keepout:** No copper, vias, traces, pours, or components on any layer in front of the XIAO ESP32-C6 antenna region. Keep the module antenna flush to the board edge with an approximately 12mm deep full-stack keepout extending across the antenna width. - **Placement Notes:** Place the XIAO module at the board top edge with antenna outward and keepout clear. Place the microSD socket on the opposite short edge for insertion access. Place ferrite bead, bulk cap, decoupling cap, and ESD array immediately adjacent to the socket. - **System Architecture:** ```mermaid flowchart TD USB["XIAO ESP32-C6 Module"] -->|SDMMC 4-bit| SD["microSD Socket"] USB -->|3V3_MAIN| FB["Ferrite Bead"] FB --> SDPWR["SD_3V3 Power Island"] SDPWR --> CDEC["10uF and 100nF Decoupling"] SDPWR --> SD SD --> ESD["Low Capacitance ESD Array"] USB --> TP["Test Pads 3V3 GND CLK CMD D0"] USB --> CD["Card Detect on D6 GPIO16"] USB --> RF["Antenna Keepout All Layers"] ALT["Fallback SDSPI Variant"] -.-> SD ``` - **SD Interface Mode:** Primary SDMMC 4-bit at 3.3V with card-detect; documented fallback to SDSPI using CLK CMD DAT0 and CD/DAT3 if layout or RF constraints force simplification. - **Part Type:** LED - **Copies:** 1 ## Key Components ### FB1 — [BLM21PG600SN1D](https://www.flux.ai/adrian95/blm21pg600sn1d.md) - Datasheet URL: https://www.murata.com/en-us/products/en-us/products/productdata/8796738977822/ENFA0005.pdf - Part Type: Ferrite Bead - License: https://creativecommons.org/licenses/by/4.0/ - Role: Power Filter - Manufacturer Name: Murata Electronics - Manufacturer Part Number: BLM21PG600SN1D - Package: 0805 - Role Details: Ferrite bead isolating 3V3 main rail from SD_3V3 socket supply island **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [DM3AT-SF-PEJM5](https://www.flux.ai/adrian95/dm3at-sf-pejm5.md) - Role: microSD Socket - Package: microSD Socket SMT - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Hirose Electric Co Ltd - Role Details: 3.3V microSD socket with card-detect for SDMMC 4-bit storage and OTA-from-SD - Manufacturer Part Number: DM3AT-SF-PEJM5 - Datasheet URL: https://www.mouser.com/datasheet/2/185/DM3AT_SF_PEJM5_CL0609_0031_0_00_2DDrawing_00009471-1614303.pdf - Part Type: Connector **Pins:** - ~ [pin SWA] - ~ [pin SWB] - CD/DAT3 [pin 2] - CLK [pin 5] - CMD [pin 3] - DAT0 [pin 7] - DAT1 [pin 8] - DAT2 [pin 1] - SHIELD [pin P3] - SHIELD [pin P4] - SHIELD [pin P1] - SHIELD [pin P2] - VDD [pin 4] - VSS [pin 6] ### TP1 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Package: SMD Test Point - Role Details: 3V3 power rail test point for bring-up - Role: Test Access **Pins:** - P1 ### TP2 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Package: SMD Test Point - Role: Test Access - Role Details: Ground test point for bring-up **Pins:** - P1 ### TP3 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role: Test Access - Role Details: SD_CLK test point for signal validation - Package: SMD Test Point **Pins:** - P1 ### TP4 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role Details: SD_CMD test point for signal validation - Package: SMD Test Point - Role: Test Access **Pins:** - P1 ### TP5 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Role: Test Access - Package: SMD Test Point - Role Details: SD_DAT0 test point for signal validation **Pins:** - P1 ### TP6 — [1.25mm SMD Test Point](https://www.flux.ai/jharwinbarrozo/1p25mm-smd-test-point.md) - Package: SMD Test Point - Role: Test Access - Role Details: SD_DAT3 or card-detect related test point for validation **Pins:** - P1 ### U1 — [Seeed Studio XIAO ESP32C6](https://www.flux.ai/seeedstudio/seeed-studio-xiao-esp32c6.md) - Manufacturer Part Number: 113991254 - Purchase Url: https://www.seeedstudio.com/Seeed-Studio-XIAO-ESP32C6-p-5884.html - wiki : https://wiki.seeedstudio.com/xiao_esp32c6_getting_started/ - Role: Main MCU Module - Package: Module - Software: OTA-from-SD to internal flash - Role Details: Seeed Studio XIAO ESP32-C6 with native USB, SDMMC 4-bit primary microSD host and OTA-from-SD support - Datasheet URL: https://files.seeedstudio.com/wiki/SeeedStudio-XIAO-ESP32C6/XIAO-ESP32-C6_v1.0_SCH_PDF_24028.pdf **Pins:** - 3V3 [pin 12] - 3V3_1 [pin 18] - 5V [pin 14] - BAT - [pin 21] - BAT + [pin 20] - BOOT_GPIO9 [pin 22] - D10_MOSI_GPIO18_SDIO-CMD [pin 11] - D7_RX_GPIO17 [pin 8] - D8_SCK_GPIO19_SDIO-CLK [pin 9] - D9_MISO_GPIO20_SDIO-DATA0 [pin 10] - EN [pin 24] - GND [pin 13] - GND_1 [pin 16] - GND_PAD [pin 19] - GPIO_TX_D6 [pin 7] - LP-GPIO0_GPIO0_0_D0 [pin 1] - LP-GPIO1_GPIO1_A1_D1 [pin 2] - LP-GPIO2_GPIO2_A2_D2 [pin 3] - LP-I2C-SCL_LB-GPIO7_GPIO7_MTDO [pin 15] - LP-I2C-SDA_LP-GPIO6_GPIO6_A6_MTCK [pin 17] - MTDI_A5_GPIO5_LB-GPIO5_LP-UART-TXD [pin 25] - MTMS_A4_GPIO4_LP-GPIO4_LP-UART-RXD [pin 23] - SDIO-DATA1_GPIO21_D3 [pin 4] - SDIO-DATA2_GPIO22_SDA_D4 [pin 5] - SDIO-DATA3_GPIO23_SCL_D5 [pin 6] ### U2 — [ESDA6V1SC6](https://www.flux.ai/lcsc/esda6v1sc6.md) - Role: ESD Protection - Role Details: Protect microSD external signal pins CMD CLK DAT0 DAT1 DAT2 DAT3 at socket entry - Manufacturer Name: TECH PUBLIC(台舟) - Manufacturer Part Number: ESDA6V1SC6 - Package: SOT-23-6 - LCSC Part Number: C2923355 - JLCPCB Part Class: Extended Part - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL - Part Type: ESD Protection Devices **Pins:** - C [pin 5] - C [pin 2] - C [pin 1] - C [pin 3] - C [pin 4] - C [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/saiko1992/exuberant-fuchsia-battle-mech-c467-e77d-b973](https://www.flux.ai/saiko1992/exuberant-fuchsia-battle-mech-c467-e77d-b973).* --- *Generated from [https://www.flux.ai/saiko1992/exuberant-fuchsia-battle-mech-c467-e77d-b973](https://www.flux.ai/saiko1992/exuberant-fuchsia-battle-mech-c467-e77d-b973)*