# STM32U3C5JI Audio MCU Block ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** jonathan-binho - **Created:** 5/6/2026 - **Last Updated:** 5/6/2026 - **Visibility:** Public ## Key Components ### FB1 — [GZ1608D601TF](https://www.flux.ai/adrian95/gz1608d601tf~3gg.md) - Part Type: Ferrite Bead - Datasheet URL: https://www.sunlordinc.com//uploads/files/20230829/GZ%20series%20of%20Multilayer%20Chip%20Ferrite%20Bead.pdf - Role Details: Filters 3V3 into VDDA using 600Ω @100MHz ferrite bead. - Role: Analog Supply Ferrite Bead - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: GZ1608D601TF - Manufacturer Name: Shenzhen Sunlord Electronics Co., Ltd. **Pins:** - 1 [pin 1] - 2 [pin 2] ### J1 — [FTSH-103-01-L-DV](https://www.flux.ai/cherepanyadima/ftsh-103-01-l-dv~u9.md) - Datasheet URL: https://suddendocs.samtec.com/catalog_english/ftsh_smt.pdf - Manufacturer Part Number: FTSH-103-01-L-DV - Role Details: 2x3 1.27mm ARM SWD header: SWCLK, SWDIO, NRST, GND, GND, SWO/trace. - Manufacturer Name: Samtec - Role: SWD Debug Header - Part Type: Connector **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] - 06 [pin 06] ### J2 — [Pin Header 01x04 2.54mm Vertical i2c](https://www.flux.ai/hasanbasri93/pin-header-01x04-2p54mm-vertical-i2c~37.md) - Role Details: I3C breakout pinout: library pin 5V is intentionally used as 3V3 target reference, GND, I3C_SDA, I3C_SCL. Rename/replace connector symbol before production so the supply pin label reads 3V3. - License: https://creativecommons.org/licenses/by/4.0/ - Connectivity: 3V3, GND, I3C_SDA, I3C_SCL - Part Type: Connector - Connector Type: Pin Header - Connector Positions: 4 - Role: I3C Breakout **Pins:** - 5V [pin 1] - GND [pin 2] - SCL [pin 4] - SDA [pin 3] ### M1 — [MP34DT06JTR](https://www.flux.ai/vasy_skral/mp34dt06jtr~bun.md) - Role Details: MP34DT06JTR on shared PDM_CLK, DOUT=PDM_D1 to U1 PA1 placeholder mapping, LR strapped to 3V3; verify final ADF/HSP data pin after exact STM32U3C5JIY6QTR swap. - Role: PDM Microphone 1 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Microphones - Manufacturer Part Number: MP34DT06JTR - Manufacturer Name: STMicroelectronics - Symbol Style: Parametric - Datasheet URL: https://datasheet.lcsc.com/lcsc/2004071606_STMicroelectronics-MP34DT06JTR_C503097.pdf **Pins:** - CLK [pin 3] - DOUT [pin 4] - GND [pin 5] - LR [pin 2] - VDD [pin 1] ### M2 — [MP34DT06JTR](https://www.flux.ai/vasy_skral/mp34dt06jtr~bun.md) - Role Details: MP34DT06JTR on shared PDM_CLK, DOUT=PDM_D2 to U1 PA2 placeholder mapping, LR strapped low; verify final ADF/HSP data pin after exact STM32U3C5JIY6QTR swap. - Part Type: Microphones - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MP34DT06JTR - Manufacturer Name: STMicroelectronics - Datasheet URL: https://datasheet.lcsc.com/lcsc/2004071606_STMicroelectronics-MP34DT06JTR_C503097.pdf - Symbol Style: Parametric - Role: PDM Microphone 2 **Pins:** - CLK [pin 3] - DOUT [pin 4] - GND [pin 5] - LR [pin 2] - VDD [pin 1] ### M3 — [MP34DT06JTR](https://www.flux.ai/vasy_skral/mp34dt06jtr~bun.md) - Part Type: Microphones - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MP34DT06JTR - Datasheet URL: https://datasheet.lcsc.com/lcsc/2004071606_STMicroelectronics-MP34DT06JTR_C503097.pdf - Symbol Style: Parametric - Manufacturer Name: STMicroelectronics - Role Details: MP34DT06JTR on shared PDM_CLK, DOUT=PDM_D3 to U1 PA3 placeholder mapping, LR strapped to 3V3; verify final ADF/HSP data pin after exact STM32U3C5JIY6QTR swap. - Role: PDM Microphone 3 **Pins:** - CLK [pin 3] - DOUT [pin 4] - GND [pin 5] - LR [pin 2] - VDD [pin 1] ### M4 — [MP34DT06JTR](https://www.flux.ai/vasy_skral/mp34dt06jtr~bun.md) - Role Details: MP34DT06JTR on shared PDM_CLK, DOUT=PDM_D4 to U1 PA4 placeholder mapping, LR strapped low; verify final ADF/HSP data pin after exact STM32U3C5JIY6QTR swap. - Manufacturer Name: STMicroelectronics - Datasheet URL: https://datasheet.lcsc.com/lcsc/2004071606_STMicroelectronics-MP34DT06JTR_C503097.pdf - Role: PDM Microphone 4 - Symbol Style: Parametric - Manufacturer Part Number: MP34DT06JTR - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Microphones **Pins:** - CLK [pin 3] - DOUT [pin 4] - GND [pin 5] - LR [pin 2] - VDD [pin 1] ### MIC1 — [MP34DT06JTR](https://www.flux.ai/vasy_skral/mp34dt06jtr~bun.md) - Role Details: MP34DT06JTR on shared PDM_CLK, DOUT=PDM_D0 to U1 PA0 placeholder mapping, LR strapped low; verify final ADF/HSP data pin after exact STM32U3C5JIY6QTR swap. - Role: PDM Microphone 0 - Symbol Style: Parametric - Datasheet URL: https://datasheet.lcsc.com/lcsc/2004071606_STMicroelectronics-MP34DT06JTR_C503097.pdf - Manufacturer Name: STMicroelectronics - Part Type: Microphones - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MP34DT06JTR **Pins:** - CLK [pin 3] - DOUT [pin 4] - GND [pin 5] - LR [pin 2] - VDD [pin 1] ### SW1 — [1571563-8](https://www.flux.ai/vasy_skral/1571563-8~oj.md) - Manufacturer Part Number: 1571563-8 - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=1308111-1_SWITCHES_CORE_PROGRAM_CATALOG&DocType=CS&DocLang=English - Part Type: Switch - Manufacturer Name: TE Connectivity ALCOSWITCH Switches - Role Details: Momentary switch pulls NRST low for manual reset. - Role: Reset Button **Pins:** - ~ [pin 3] - ~ [pin 2] - ~ [pin 1] - ~ [pin 4] ### SW2 — [1571563-8](https://www.flux.ai/vasy_skral/1571563-8~oj.md) - Role: Boot Button - Manufacturer Part Number: 1571563-8 - Role Details: Momentary switch pulls BOOT0 high for STM32 system bootloader recovery. - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=1308111-1_SWITCHES_CORE_PROGRAM_CATALOG&DocType=CS&DocLang=English - Manufacturer Name: TE Connectivity ALCOSWITCH Switches - Part Type: Switch **Pins:** - ~ [pin 3] - ~ [pin 2] - ~ [pin 1] - ~ [pin 4] ### TP1 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 0.5 **Pins:** - P1 ### TP2 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 0.5 **Pins:** - P1 ### U1 — [STM32L476JGY3TR](https://www.flux.ai/lcsc/stm32l476jgy3tr~0ch.md) - Datasheet URL: https://www.st.com/resource/en/datasheet/stm32u3c5ji.pdf - Role: Placeholder Primary Audio MCU - Manufacturer Name: STMicroelectronics - Package or Case Code: WLCSP72_SMPS / B0TG; 72-ball 3.67 x 3.58 mm, 0.40 mm pitch; placeholder footprint remains STM32L476 WLCSP72 until exact part creation - Part Type: Microcontroller - Implementation Details: U1 remains an STM32L476JGY3TR placeholder because exact STM32U3C5JIY6QTR part creation/import is unavailable in this session. Datasheet metadata applied for manual part review: WLCSP72_SMPS B0TG, 72 balls, 3.67 x 3.58 mm, pitch eD 0.40 mm, eE 0.69 mm, ball dia b 0.23/0.25/0.28 mm, D1 3.00 mm, E1 2.77 mm, SD 0.10 mm, SE 0.31 mm. No WLCSP72 recommended PCB land pattern was found in the PDF; footprint pads must be reviewed against ST package data before fabrication. I3C verified from Table 21: PC0=E15 I3C2_SCL AF6, PC1=D12 I3C1_SDA AF5/I3C2_SDA AF6, PB10=G3 I3C2_SCL AF3/I3C1_SCL AF6, PB12=J1 I3C1_SDA AF3/I3C2_SDA AF6, PB13=F2 I3C1_SCL AF3/I3C2_SCL AF6, PB14=F4 I3C2_SDA AF6. Current schematic routes primary inter-MCU I3C1 to PB10/PB12 through R7/R8; PC0/PC1 and PB13/PB14 are documented alternate I3C2 options for final symbol review. - Role Details: DATASHEET-CONFIGURED PLACEHOLDER for STM32U3C5JIY6QTR WLCSP72_SMPS. PDF DS15096 Rev 2 extracted: WLCSP72_SMPS ball map has A1 VDD, A3 VDDUSB, A5 PC12, A7 PD2, A9 PB3, A11 PB7, A13 VSS, A15 VDD; B2 VSS, B4 PC10, B6 PC11, B8 PB4, B10 PB8, B12 PB9, B14 PC13, B16 VBAT; C1 PA11, C3 PA12, C5 PA13, C7 PA14, C9 PB5, C11 PH3-BOOT0, C13 PC15-OSC32_OUT, C15 PC14-OSC32_IN; D2 PA8, D4 PA9, D6 PA10, D8 PA15, D10 PB6, D12 PC1, D14 PH1-OSC_OUT, D16 PH0-OSC_IN; E1 PC7, E3 PC6, E5 PC8, E7 PC9, E9 PA1, E11 PC2, E13 PC3, E15 PC0; F2 PB13, F4 PB14, F6 PE14, F8 PE13, F10 PA7, F12 PA4, F14 PA0, F16 NRST; G1 PB15, G3 PB10, G5 PB11, G7 PE10, G9 PB0, G11 PA5, G13 PA2, G15 VSSA; H2 VDD, H4 VSS, H6 VSSSMPS, H8 PE11, H10 PB2, H12 PA6, H14 PA3, H16 VDDA; J1 PB12, J3 VDD11, J5 VDDSMPS, J7 VLXSMPS, J9 PE12, J11 PB1, J13 VDD, J15 VSS. - Manufacturer Part Number: STM32U3C5JIY6QTR - LCSC Part Number: C1857441 - JLCPCB Part Class: Extended Part **Pins:** - BOOT0 [pin D7] - NRST [pin E9] - PA0 [pin H8] - PA1 [pin G4] - PA10 [pin D2] - PA11 [pin D1] - PA12 [pin C1] - PA13 [pin C2] - PA14 [pin B2] - PA15 [pin A2] - PA2 [pin G6] - PA3 [pin H7] - PA4 [pin G5] - PA5 [pin H6] - PA6 [pin H5] - PA7 [pin H4] - PA8 [pin E2] - PA9 [pin E3] - PB0 [pin J5] - PB1 [pin J4] - PB10 [pin H3] - PB11 [pin G3] - PB12 [pin H1] - PB13 [pin H2] - PB14 [pin G2] - PB15 [pin G1] - PB2 [pin J3] - PB3 [pin A6] - PB4 [pin C6] - PB5 [pin C7] - PB6 [pin B7] - PB7 [pin A7] - PB8 [pin E7] - PB9 [pin E8] - PC0 [pin F9] - PC1 [pin F8] - PC10 [pin D3] - PC11 [pin C3] - PC12 [pin B3] - PC13 [pin B8] - PC14-OSC32_IN [pin C9] - PC15-OSC32_OUT [pin C8] - PC2 [pin F7] - PC3 [pin G7] - PC4 [pin J7] - PC5 [pin J6] - PC6 [pin F3] - PC7 [pin F1] - PC8 [pin F2] - PC9 [pin E1] - PD2 [pin A3] - PG10 [pin B4] - PG11 [pin C4] - PG12 [pin C5] - PG13 [pin B5] - PG14 [pin A5] - PG9 [pin A4] - PH0-OSC_IN [pin D9] - PH1-OSC_OUT [pin D8] - VBAT [pin B9] - VDD [pin A9] - VDD [pin J1] - VDD [pin J8] - VDDA [pin H9] - VDDIO2 [pin B6] - VDDUSB [pin A1] - VREF+ [pin G8] - VSS [pin A8] - VSS [pin B1] - VSS [pin J9] - VSS [pin J2] - VSSA/VREF- [pin G9] ### Y1 — [FOXSDLF/080-20](https://www.flux.ai/adrian95/foxsdlf080-20~obe.md) - Frequency: 8MHz - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: Fox Electronics - Role: HSE Clock - Manufacturer Name: FOXSDLF/080-20 - Datasheet URL: https://abracon.com/datasheets/Fox/FC4SD.pdf?utm_source=foxonline.com&utm_medium=301 - Role Details: 8MHz HSE crystal option connected to placeholder PH0/PH1 OSC pins; load caps C13/C14 currently 33pF and must be recalculated against final crystal CL and board parasitics before production. - Part Type: Oscillator **Pins:** - P1 [pin 1] - P2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/jonathan-binho/stm32u3c5ji-audio-mcu-block~30](https://www.flux.ai/jonathan-binho/stm32u3c5ji-audio-mcu-block~30).* --- *Generated from [https://www.flux.ai/jonathan-binho/stm32u3c5ji-audio-mcu-block~30](https://www.flux.ai/jonathan-binho/stm32u3c5ji-audio-mcu-block~30)*