STM32C551 (LQFP-100(14x14))
| Pin | Symbol | Type | Function (EN) |
|---|---|---|---|
| 1 | PE2 | I/O | Multiplexed I/O & Peripheral Pin PE2 (General) |
| 2 | PE3 | I/O | Multiplexed I/O & Peripheral Pin PE3 (General) |
| 3 | PE4 | I/O | Multiplexed I/O & Peripheral Pin PE4 (General) |
| 4 | PE5 | I/O | Multiplexed I/O & Peripheral Pin PE5 (General) |
| 5 | PE6 | I/O | Multiplexed I/O & Peripheral Pin PE6 (General) |
| 6 | PH15 | I/O | Multiplexed I/O & Peripheral Pin PH15 (General) |
| 7 | PC13 | I/O | Multiplexed I/O & Peripheral Pin PC13 (General) |
| 8 | IO0 | I/O | GPIO0 / RTC_GPIO0 (Chip Boot Mode Strapping Pin) |
| 9 | IO4 | I/O | GPIO4 / RTC_GPIO4 / TOUCH4 / ADC1_CH3 |
| 10 | VSS | GND | Ground Reference Pin (VSS) |
| 11 | VDD | Power | Power Supply Input (VDD — 3.3V VDD (Max 4.0V)) |
| 12 | PH0-OSC_IN (PH0) | I/O | Multiplexed I/O & Peripheral Pin PH0-OSC_IN (PH0) (RTC/CLK) |
| 13 | PH1-OSC_OUT (PH1) | I/O | Multiplexed I/O & Peripheral Pin PH1-OSC_OUT (PH1) (RTC/CLK) |
| 14 | NRST | I | System Enable & Hardware Reset (NRST) |
| 15 | PC0 | I/O | Multiplexed I/O & Peripheral Pin PC0 (General) |
| 16 | PC1 | I/O | Multiplexed I/O & Peripheral Pin PC1 (General) |
| 17 | PC2 | I/O | Multiplexed I/O & Peripheral Pin PC2 (General) |
| 18 | PC3 | I/O | Multiplexed I/O & Peripheral Pin PC3 (General) |
| 19 | PH4 | I/O | Multiplexed I/O & Peripheral Pin PH4 (General) |
| 20 | VREF- | I/O | Multiplexed I/O & Peripheral Pin VREF- (General) |
| 21 | VREF+ | I/O | Multiplexed I/O & Peripheral Pin VREF+ (General) |
| 22 | PH5 | I/O | Multiplexed I/O & Peripheral Pin PH5 (General) |
| 23 | PA0 | I/O | Multiplexed I/O & Peripheral Pin PA0 (General) |
| 24 | PA1 | I/O | Multiplexed I/O & Peripheral Pin PA1 (General) |
| 25 | PA2 | I/O | Multiplexed I/O & Peripheral Pin PA2 (General) |
| 26 | PA3 | I/O | Multiplexed I/O & Peripheral Pin PA3 (General) |
| 27 | VSS | GND | Ground Reference Pin (VSS) |
| 28 | VDD | Power | Power Supply Input (VDD — 3.3V VDD (Max 4.0V)) |
| 29 | PA4 | I/O | Multiplexed I/O & Peripheral Pin PA4 (General) |
| 30 | PA5 | I/O | Multiplexed I/O & Peripheral Pin PA5 (General) |
| 31 | PA6 | I/O | Multiplexed I/O & Peripheral Pin PA6 (General) |
| 32 | PA7 | I/O | Multiplexed I/O & Peripheral Pin PA7 (General) |
| 33 | PC4 | I/O | Multiplexed I/O & Peripheral Pin PC4 (General) |
| 34 | PC5 | I/O | Multiplexed I/O & Peripheral Pin PC5 (General) |
| 35 | PB0 | I/O | Multiplexed I/O & Peripheral Pin PB0 (General) |
| 36 | PB1 | I/O | Multiplexed I/O & Peripheral Pin PB1 (General) |
| 37 | PB2 | I/O | Multiplexed I/O & Peripheral Pin PB2 (General) |
| 38 | PE7 | I/O | Multiplexed I/O & Peripheral Pin PE7 (General) |
| 39 | PE8 | I/O | Multiplexed I/O & Peripheral Pin PE8 (General) |
| 40 | PE9 | I/O | Multiplexed I/O & Peripheral Pin PE9 (General) |
| 41 | PE10 | I/O | Multiplexed I/O & Peripheral Pin PE10 (General) |
| 42 | PE11 | I/O | Multiplexed I/O & Peripheral Pin PE11 (General) |
| 43 | PE12 | I/O | Multiplexed I/O & Peripheral Pin PE12 (General) |
| 44 | PE13 | I/O | Multiplexed I/O & Peripheral Pin PE13 (General) |
| 45 | PE14 | I/O | Multiplexed I/O & Peripheral Pin PE14 (General) |
| 46 | PE15 | I/O | Multiplexed I/O & Peripheral Pin PE15 (General) |
| 47 | PB10 | I/O | Multiplexed I/O & Peripheral Pin PB10 (General) |
| 48 | VCAP | I/O | Multiplexed I/O & Peripheral Pin VCAP (General) |
| 49 | VSS | GND | Exposed Thermal & Ground Pad (VSS) |
| 50 | VDD | Power | Power Supply Input (VDD — 3.3V VDD (Max 4.0V)) |
| 51 | PB12 | I/O | Multiplexed I/O & Peripheral Pin PB12 (General) |
| 52 | PB13 | I/O | Multiplexed I/O & Peripheral Pin PB13 (General) |
| 53 | PB14 | I/O | Multiplexed I/O & Peripheral Pin PB14 (General) |
| 54 | PB15 | I/O | Multiplexed I/O & Peripheral Pin PB15 (General) |
| 55 | PD8 | I/O | Multiplexed I/O & Peripheral Pin PD8 (General) |
| 56 | PD9 | I/O | Multiplexed I/O & Peripheral Pin PD9 (General) |
| 57 | PD10 | I/O | Multiplexed I/O & Peripheral Pin PD10 (General) |
| 58 | PD11 | I/O | Multiplexed I/O & Peripheral Pin PD11 (General) |
| 59 | PD12 | I/O | Multiplexed I/O & Peripheral Pin PD12 (General) |
| 60 | PD13 | I/O | Multiplexed I/O & Peripheral Pin PD13 (General) |
| 61 | PD14 | I/O | Multiplexed I/O & Peripheral Pin PD14 (General) |
| 62 | PD15 | I/O | Multiplexed I/O & Peripheral Pin PD15 (General) |
| 63 | PC6 | I/O | Multiplexed I/O & Peripheral Pin PC6 (General) |
| 64 | PC7 | I/O | Multiplexed I/O & Peripheral Pin PC7 (General) |
| 65 | PC8 | I/O | Multiplexed I/O & Peripheral Pin PC8 (General) |
| 66 | PC9 | I/O | Multiplexed I/O & Peripheral Pin PC9 (General) |
| 67 | PA8 | I/O | Multiplexed I/O & Peripheral Pin PA8 (General) |
| 68 | PA9 | I/O | Multiplexed I/O & Peripheral Pin PA9 (General) |
| 69 | PA10 | I/O | Multiplexed I/O & Peripheral Pin PA10 (General) |
| 70 | PA11 | I/O | Multiplexed I/O & Peripheral Pin PA11 (General) |
| 71 | PA12 | I/O | Multiplexed I/O & Peripheral Pin PA12 (General) |
| 72 | PA13 (JTMS/SWDIO) | I/O | Multiplexed I/O & Peripheral Pin PA13 (JTMS/SWDIO) (SWD/JTAG) |
| 73 | PH3 | I/O | Multiplexed I/O & Peripheral Pin PH3 (General) |
| 74 | VSS | GND | Ground Reference Pin (VSS) |
| 75 | VDD | Power | Power Supply Input (VDD — 3.3V VDD (Max 4.0V)) |
| 76 | PA14 (JTCK/SWCLK) | I/O | Multiplexed I/O & Peripheral Pin PA14 (JTCK/SWCLK) (SWD/JTAG) |
| 77 | PA15(JTDI) | I/O | Multiplexed I/O & Peripheral Pin PA15(JTDI) (SWD/JTAG) |
| 78 | PC10 | I/O | Multiplexed I/O & Peripheral Pin PC10 (General) |
| 79 | PC11 | I/O | Multiplexed I/O & Peripheral Pin PC11 (General) |
| 80 | PC12 | I/O | Multiplexed I/O & Peripheral Pin PC12 (General) |
| 81 | PD0 | I/O | Multiplexed I/O & Peripheral Pin PD0 (General) |
| 82 | PD1 | I/O | Multiplexed I/O & Peripheral Pin PD1 (General) |
| 83 | PD2 | I/O | Multiplexed I/O & Peripheral Pin PD2 (General) |
| 84 | PD3 | I/O | Multiplexed I/O & Peripheral Pin PD3 (General) |
| 85 | PD4 | I/O | Multiplexed I/O & Peripheral Pin PD4 (General) |
| 86 | PD5 | I/O | Multiplexed I/O & Peripheral Pin PD5 (General) |
| 87 | PD6 | I/O | Multiplexed I/O & Peripheral Pin PD6 (General) |
| 88 | PD7 | I/O | Multiplexed I/O & Peripheral Pin PD7 (General) |
| 89 | PB3 (JTDO/TRACESWO) | I/O | Multiplexed I/O & Peripheral Pin PB3 (JTDO/TRACESWO) (SWD/JTAG) |
| 90 | PB4 (NJTRST) | I/O | Multiplexed I/O & Peripheral Pin PB4 (NJTRST) (SWD/JTAG) |
| 91 | PB5 | I/O | Multiplexed I/O & Peripheral Pin PB5 (General) |
| 92 | PB6 | I/O | Multiplexed I/O & Peripheral Pin PB6 (General) |
| 93 | PB7 | I/O | Multiplexed I/O & Peripheral Pin PB7 (General) |
| 94 | PH2-BOOT0 | I/O | Multiplexed I/O & Peripheral Pin PH2-BOOT0 (General) |
| 95 | PB8 | I/O | Multiplexed I/O & Peripheral Pin PB8 (General) |
| 96 | PB9 | I/O | Multiplexed I/O & Peripheral Pin PB9 (General) |
| 97 | PE0 | I/O | Multiplexed I/O & Peripheral Pin PE0 (General) |
| 98 | PE1 | I/O | Multiplexed I/O & Peripheral Pin PE1 (General) |
| 99 | VSS | GND | Ground Reference Pin (VSS) |
| 100 | VDD | Power | Power Supply Input (VDD — 3.3V VDD (Max 4.0V)) |
STM32C551 (LQFP-100(14x14))
STM32C551 (LQFP-100(14x14))
| Designator / Replacement MPN | Value / Package | Function & PCB Layout Rule |
|---|---|---|
| N/A BOM | Per application circuit LQFP-100(14x14) | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Manufactured by ST, the STM32C551VCT6 is housed in a LQFP-100(14x14) package with 100 pins and a 0.50 mm lead pitch. Key pins include: 1 (PE2: Multiplexed I/O & Peripheral Pin PE2 (General)), 2 (PE3: Multiplexed I/O & Peripheral Pin PE3 (General)), 3 (PE4: Multiplexed I/O & Peripheral Pin PE4 (General)), 4 (PE5: Multiplexed I/O & Peripheral Pin PE5 (General)), 5 (PE6: Multiplexed I/O & Peripheral Pin PE6 (General)), 6 (PH15: Multiplexed I/O & Peripheral Pin PH15 (General)).
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), STM32C551VCT6 (LQFP-100(14x14)) has a nominal body envelope of 14.00 × 14.00 mm, pitch e = 0.50 mm, and 100 copper pads.
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for STM32C551VCT6 (ST, LQFP-100(14x14)) directly on this page, including KiCad 8 Footprints (.kicad_mod), Schematic Symbols (.kicad_sym), Autodesk Fusion 360 / Eagle (.lbr), and 3D STEP AP214 / WebGL GLB models.
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | PE2 | Digital_IO | Signal terminal PE2 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE2. Supported peripheral buses: General. |
| 2 | PE3 | Digital_IO | Signal terminal PE3 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE3. Supported peripheral buses: General. |
| 3 | PE4 | Digital_IO | Signal terminal PE4 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE4. Supported peripheral buses: General. |
| 4 | PE5 | Digital_IO | Signal terminal PE5 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE5. Supported peripheral buses: General. |
| 5 | PE6 | Digital_IO | Signal terminal PE6 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE6. Supported peripheral buses: General. |
| 6 | PH15 | Digital_IO | Signal terminal PH15 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PH15. Supported peripheral buses: General. |
| 7 | PC13 | Digital_IO | Signal terminal PC13 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC13. Supported peripheral buses: General. |
| 8 | IO0 | Digital_IO | GPIO0 / RTC_GPIO0 (Chip Boot Mode Strapping Pin) |
| 9 | IO4 | Digital_IO | GPIO4 / RTC_GPIO4 / TOUCH4 / ADC1_CH3 |
| 10 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 11 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| 12 | PH0-OSC_IN (PH0) | Digital_IO | Signal terminal PH0-OSC_IN (PH0) (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PH0-OSC_IN (PH0). Supported peripheral buses: RTC/CLK. |
| 13 | PH1-OSC_OUT (PH1) | Digital_IO | Signal terminal PH1-OSC_OUT (PH1) (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PH1-OSC_OUT (PH1). Supported peripheral buses: RTC/CLK. |
| 14 | NRST | Digital_IO | Active-low hardware reset terminal (NRST): pulling this pin Low resets the processor core and peripherals. |
| 15 | PC0 | Digital_IO | Signal terminal PC0 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC0. Supported peripheral buses: General. |
| 16 | PC1 | Digital_IO | Signal terminal PC1 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC1. Supported peripheral buses: General. |
| 17 | PC2 | Digital_IO | Signal terminal PC2 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC2. Supported peripheral buses: General. |
| 18 | PC3 | Digital_IO | Signal terminal PC3 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC3. Supported peripheral buses: General. |
| 19 | PH4 | Digital_IO | Signal terminal PH4 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PH4. Supported peripheral buses: General. |
| 20 | VREF- | Digital_IO | Signal terminal VREF- (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: VREF-. Supported peripheral buses: General. |
| 21 | VREF+ | Digital_IO | Signal terminal VREF+ (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: VREF+. Supported peripheral buses: General. |
| 22 | PH5 | Digital_IO | Signal terminal PH5 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PH5. Supported peripheral buses: General. |
| 23 | PA0 | Digital_IO | Signal terminal PA0 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA0. Supported peripheral buses: General. |
| 24 | PA1 | Digital_IO | Signal terminal PA1 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA1. Supported peripheral buses: General. |
| 25 | PA2 | Digital_IO | Signal terminal PA2 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA2. Supported peripheral buses: General. |
| 26 | PA3 | Digital_IO | Signal terminal PA3 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA3. Supported peripheral buses: General. |
| 27 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 28 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| 29 | PA4 | Digital_IO | Signal terminal PA4 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA4. Supported peripheral buses: General. |
| 30 | PA5 | Digital_IO | Signal terminal PA5 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA5. Supported peripheral buses: General. |
| 31 | PA6 | Digital_IO | Signal terminal PA6 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA6. Supported peripheral buses: General. |
| 32 | PA7 | Digital_IO | Signal terminal PA7 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PA7. Supported peripheral buses: General. |
| 33 | PC4 | Digital_IO | Signal terminal PC4 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC4. Supported peripheral buses: General. |
| 34 | PC5 | Digital_IO | Signal terminal PC5 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC5. Supported peripheral buses: General. |
| 35 | PB0 | Digital_IO | Signal terminal PB0 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB0. Supported peripheral buses: General. |
| 36 | PB1 | Digital_IO | Signal terminal PB1 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB1. Supported peripheral buses: General. |
| 37 | PB2 | Digital_IO | Signal terminal PB2 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB2. Supported peripheral buses: General. |
| 38 | PE7 | Digital_IO | Signal terminal PE7 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE7. Supported peripheral buses: General. |
| 39 | PE8 | Digital_IO | Signal terminal PE8 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE8. Supported peripheral buses: General. |
| 40 | PE9 | Digital_IO | Signal terminal PE9 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE9. Supported peripheral buses: General. |
| 41 | PE10 | Digital_IO | Signal terminal PE10 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE10. Supported peripheral buses: General. |
| 42 | PE11 | Digital_IO | Signal terminal PE11 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE11. Supported peripheral buses: General. |
| 43 | PE12 | Digital_IO | Signal terminal PE12 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE12. Supported peripheral buses: General. |
| 44 | PE13 | Digital_IO | Signal terminal PE13 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE13. Supported peripheral buses: General. |
| 45 | PE14 | Digital_IO | Signal terminal PE14 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE14. Supported peripheral buses: General. |
| 46 | PE15 | Digital_IO | Signal terminal PE15 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PE15. Supported peripheral buses: General. |
| 47 | PB10 | Digital_IO | Signal terminal PB10 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB10. Supported peripheral buses: General. |
| 48 | VCAP | Digital_IO | Signal terminal VCAP (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: VCAP. Supported peripheral buses: General. |
| 49 | VSS | GND | Bottom exposed die attach pad (VSS) providing primary thermal conduction path to the PCB and low-inductance 0V ground return. |
| 50 | VDD | Power_In | Primary positive power supply input (VDD) operating in the 3.3V VDD (Max 4.0V) domain (Max rating: 4.0V). |
| 51 | PB12 | Digital_IO | Signal terminal PB12 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB12. Supported peripheral buses: General. |
| 52 | PB13 | Digital_IO | Signal terminal PB13 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB13. Supported peripheral buses: General. |
| 53 | PB14 | Digital_IO | Signal terminal PB14 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB14. Supported peripheral buses: General. |
| 54 | PB15 | Digital_IO | Signal terminal PB15 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PB15. Supported peripheral buses: General. |
| 55 | PD8 | Digital_IO | Signal terminal PD8 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD8. Supported peripheral buses: General. |
| 56 | PD9 | Digital_IO | Signal terminal PD9 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD9. Supported peripheral buses: General. |
| 57 | PD10 | Digital_IO | Signal terminal PD10 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD10. Supported peripheral buses: General. |
| 58 | PD11 | Digital_IO | Signal terminal PD11 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD11. Supported peripheral buses: General. |
| 59 | PD12 | Digital_IO | Signal terminal PD12 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD12. Supported peripheral buses: General. |
| 60 | PD13 | Digital_IO | Signal terminal PD13 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD13. Supported peripheral buses: General. |
| 61 | PD14 | Digital_IO | Signal terminal PD14 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD14. Supported peripheral buses: General. |
| 62 | PD15 | Digital_IO | Signal terminal PD15 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PD15. Supported peripheral buses: General. |
| 63 | PC6 | Digital_IO | Signal terminal PC6 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC6. Supported peripheral buses: General. |
| 64 | PC7 | Digital_IO | Signal terminal PC7 (I/O, 3.3V VDD (Max 4.0V) domain). Multiplexed alternate functions: PC7. Supported peripheral buses: General. |