# STM32F103C8T6 USB Dev Board ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** hjh2002 - **Created:** 4/1/2026 - **Last Updated:** 4/1/2026 - **Visibility:** Public ## Key Components ### D1 — [USBLC6-2SC6](https://www.flux.ai/cherepanyadima/usblc6-2sc6~4b.md) - Role Details: Protect USB D+ and D- lines and connector side from ESD events - Package: SOT-23-6 - Role: USB ESD Protection - Datasheet URL: https://www.st.com/resource/en/datasheet/cd00050750.pdf - Manufacturer Name: STMicroelectronics - Part Type: Diode - Manufacturer Part Number: USBLC6-2SC6 **Pins:** - GND [pin 2] - I/O1_IN [pin 1] - I/O1_OUT [pin 6] - I/O2_IN [pin 3] - I/O2_OUT [pin 4] - VBUS [pin 5] ### J1 — [USB4520-03-0-A](https://www.flux.ai/adrian95/usb4520-03-0-a~ufd.md) - Role: USB Connector - Manufacturer Name: GCT - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: USB4520-03-0-A - Role Details: USB Type-C connector providing VBUS, GND, CC1, CC2, D+, and D- for power and native USB FS - Datasheet URL: https://www.mouser.com/datasheet/2/837/GCT_USB4520-3134575.pdf - Part Type: Connector - Package: SMT **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND_A [pin A1_B12] - GND_B [pin B1_A12] - SBU1 [pin A8] - SBU2 [pin B8] - SHELL_GND [pin S3] - SHELL_GND [pin S2] - SHELL_GND [pin S1] - SHELL_GND [pin S4] - VBUS_A [pin A4_B9] - VBUS_B [pin B4_A9] ### J2 — [FTSH-103-01-L-DV](https://www.flux.ai/cherepanyadima/ftsh-103-01-l-dv~u9.md) - Role Details: SWD programming and debug access for STM32 target - Package: SMT 2x3 1.27mm - Manufacturer Part Number: FTSH-103-01-L-DV - Datasheet URL: https://suddendocs.samtec.com/catalog_english/ftsh_smt.pdf - Role: SWD Header - Manufacturer Name: Samtec - Part Type: Connector **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] - 06 [pin 06] ### J3 — [FTSH-105-01-L-DV-K-TR](https://www.flux.ai/jecstronic/ftsh-105-01-l-dv-k-tr~drj.md) - Role Details: SMT board-edge header exposing GPIOA lower pins and power rails - Part Type: Connector - Package: SMT 1x10 1.27mm - License: https://creativecommons.org/licenses/by/4.0/ - Role: GPIO Header Left - Datasheet URL: https://suddendocs.samtec.com/catalog_english/ftsh_smt.pdf - Manufacturer Part Number: FTSH-105-01-L-DV-K-TR - Manufacturer Name: Samtec Inc. **Pins:** - Pin_1 [pin 01] - Pin_10 [pin 10] - Pin_2 [pin 02] - Pin_3 [pin 03] - Pin_4 [pin 04] - Pin_5 [pin 05] - Pin_6 [pin 06] - Pin_7 [pin 07] - Pin_8 [pin 08] - Pin_9 [pin 09] ### J4 — [FTSH-105-01-L-DV-K-TR](https://www.flux.ai/jecstronic/ftsh-105-01-l-dv-k-tr~drj.md) - Manufacturer Part Number: FTSH-105-01-L-DV-K-TR - Manufacturer Name: Samtec Inc. - Package: SMT 1x10 1.27mm - Datasheet URL: https://suddendocs.samtec.com/catalog_english/ftsh_smt.pdf - Role Details: SMT board-edge header exposing GPIOB pins, UART pins, and control/debug-related signals - Role: GPIO Header Right - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 01] - Pin_10 [pin 10] - Pin_2 [pin 02] - Pin_3 [pin 03] - Pin_4 [pin 04] - Pin_5 [pin 05] - Pin_6 [pin 06] - Pin_7 [pin 07] - Pin_8 [pin 08] - Pin_9 [pin 09] ### LED1 — [LED 0603 (1608 Metric)](https://www.flux.ai/jharwinbarrozo/generic-led-0603-1608-metric~yk.md) - Part Type: LED - Package: 0603 - Role: User LED - Role Details: Status LED driven by PC13 through series resistor **Pins:** - A [pin 2] - K [pin 1] ### SW1 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Package: SMT - Role: Reset Button - Manufacturer Name: C&K - Part Type: Switch - Manufacturer Part Number: PTS810SJK250SMTRLFS - Role Details: Momentary pushbutton pulling NRST low **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW2 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Role: BOOT0 Button - Manufacturer Name: C&K - Package: SMT - Part Type: Switch - Manufacturer Part Number: PTS810SJK250SMTRLFS - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Role Details: Momentary pushbutton forcing BOOT0 high **Pins:** - P1 [pin 1] - P3 [pin 3] ### U1 — [STM32F103C8T6](https://www.flux.ai/jharwinbarrozo/stm32f103c8t6~qe2.md) - Manufacturer Name: STMicroelectronics - Role: Microcontroller - Role Details: STM32F103C8T6 ARM Cortex-M3 microcontroller with SWD and USB FS support - Manufacturer Part Number: STM32F103C8T6 - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151642_STMicroelectronics-STM32F103C8T6_C8734.pdf - Part Type: Microcontroller - Package: LQFP-48 **Pins:** - BOOT0 [pin 44] - NRST [pin 7] - PA0_WKUP [pin 10] - PA1 [pin 11] - PA10 [pin 31] - PA11 [pin 32] - PA12 [pin 33] - PA13 [pin 34] - PA14 [pin 37] - PA15 [pin 38] - PA2 [pin 12] - PA3 [pin 13] - PA4 [pin 14] - PA5 [pin 15] - PA6 [pin 16] - PA7 [pin 17] - PA8 [pin 29] - PA9 [pin 30] - PB0 [pin 18] - PB1 [pin 19] - PB10 [pin 21] - PB11 [pin 22] - PB12 [pin 25] - PB13 [pin 26] - PB14 [pin 27] - PB15 [pin 28] - PB2 [pin 20] - PB3 [pin 39] - PB4 [pin 40] - PB5 [pin 41] - PB6 [pin 42] - PB7 [pin 43] - PB8 [pin 45] - PB9 [pin 46] - PC13_TAMPER_RTC [pin 2] - PC14_OSC32_IN [pin 3] - PC15_OSC32_OUT [pin 4] - PD0_OSC_IN [pin 5] - PD1_OSC_OUT [pin 6] - VBAT [pin 1] - VDD [pin 24] - VDD [pin 48] - VDD [pin 36] - VDDA [pin 9] - VSS [pin 23] - VSS [pin 47] - VSS [pin 35] - VSSA [pin 8] ### U2 — [ME6211C33M5G-N](https://www.flux.ai/jecstronic/me6211c33m5g-n~a2.md) - Package: SOT-23-5 - Role Details: LDO regulator converting USB 5V to 3.3V for STM32 and peripherals - Role: 3.3V Regulator - Manufacturer Part Number: ME6211C33M5G-N - Manufacturer Name: MICRONE(Nanjing Micro One Elec) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811131510_MICRONE-Nanjing-Micro-One-Elec-ME6211C33M5G-N_C82942.pdf - Part Type: LDO **Pins:** - CE - NC - VIN - VOUT - VSS ### Y1 — [NX3225GD 8.000MHZ STD-CRA-3](https://www.flux.ai/lcsc/nx3225gd-8p000mhz-std-cra-3~g3w.md) - LCSC Part Number: C528999 - Manufacturer Part Number: NX3225GD 8.000MHZ STD-CRA-3 - Package or Case Code: CRYSTAL-SMD_2P-L3.2-W2.5 - Role Details: 8MHz crystal for precise STM32 system clock and USB timing - Manufacturer Name: NDK - Role: HSE Crystal - Package: SMD 3225 **Pins:** - 1 [pin 1] - GND [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/hjh2002/stm32f103c8t6-usb-dev-board~v5](https://www.flux.ai/hjh2002/stm32f103c8t6-usb-dev-board~v5).* --- *Generated from [https://www.flux.ai/hjh2002/stm32f103c8t6-usb-dev-board~v5](https://www.flux.ai/hjh2002/stm32f103c8t6-usb-dev-board~v5)*