Pin Function Grouping

Looking at the datasheet of this component, can you group together pins by their functions? for example for Power, 3v3, gnd_1 gnd_2 etc
NOTE: If you group them, can you not add the same pin if you already added them in a group? You should know which pin function is common for its function

Worked for 1 min 21 sec

flux

I grouped the STM32F103C8T6 LQFP-48 pins into non-overlapping functional groups: Power/3.3V, Ground, Clock, Control, GPIO Port A, GPIO Port B, and GPIO Port C. Full grouping is in the STM32F103C8T6 Pin Function Groups project file.

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STM32F103C8T6 Pin Function Groups

This grouping uses the current STM32F103C8T6 LQFP-48 terminal list in the project and follows the rule that every pin belongs to exactly one functional group. I kept multifunction pins in their most common/high-level group first, so no pin is repeated across groups.

Grouping rules used

Power: supply/reference pins: VBAT, VDD, VDDA.
Ground: VSS/VSSA return pins.
Clock: external oscillator pins and low-speed oscillator pins.
Control: reset and boot configuration pins.
GPIO Port A / B / C: remaining GPIO pins grouped by MCU port prefix.
Debug/USB/UART/SPI/I2C/ADC alternate functions are not duplicated into separate groups, because those functions share the same physical GPIO pins.

Functional pin groups — no duplicates

Table

Group	Pins
Power / 3.3V supplies	Pin 1 `VBAT`; Pin 9 `VDDA`; Pin 24 `VDD`; Pin 36 `VDD`; Pin 48 `VDD`
Ground returns	Pin 8 `VSSA`; Pin 23 `VSS`; Pin 35 `VSS`; Pin 47 `VSS`
Clock / oscillator	Pin 3 `PC14-OSC32_IN`; Pin 4 `PC15-OSC32_OUT`; Pin 5 `PD0_OSC_IN`; Pin 6 `PD1_OSC_OUT`
Control / configuration	Pin 7 `NRST`; Pin 44 `BOOT0`
GPIO Port A	Pin 10 `PA0_WKUP`; Pin 11 `PA1`; Pin 12 `PA2`; Pin 13 `PA3`; Pin 14 `PA4`; Pin 15 `PA5`; Pin 16 `PA6`; Pin 17 `PA7`; Pin 29 `PA8`; Pin 30 `PA9`; Pin 31 `PA10`; Pin 32 `PA11`; Pin 33 `PA12`; Pin 34 `PA13`; Pin 37 `PA14`; Pin 38 `PA15`
GPIO Port B	Pin 18 `PB0`; Pin 19 `PB1`; Pin 20 `PB2`; Pin 21 `PB10`; Pin 22 `PB11`; Pin 25 `PB12`; Pin 26 `PB13`; Pin 27 `PB14`; Pin 28 `PB15`; Pin 39 `PB3`; Pin 40 `PB4`; Pin 41 `PB5`; Pin 42 `PB6`; Pin 43 `PB7`; Pin 45 `PB8`; Pin 46 `PB9`
GPIO Port C	Pin 2 `PC13-TAMPER-RTC`

Suggested Flux properties

If you want these applied to the part terminals, I would use these property values:

Table

Group	Section	Pin Group	Pin Type	Pin Orientation	Sub-symbol Designator Suffix
Power / 3.3V supplies	Power	Power	Power In	Top	Power
Ground returns	Ground	Ground	Ground	Bottom	Power
Clock / oscillator	Clock	Clock	Passive	Left	Clock
Control / configuration	Control	`RESET` for NRST, `BOOT0` for BOOT0	Input	Left	Control
GPIO Port A	GPIO	PA	Bi-Directional	Left	GPIOA
GPIO Port B	GPIO	PB	Bi-Directional	Left	GPIOB
GPIO Port C	GPIO	PC	Bi-Directional	Left	GPIOC

Notes

PA11/PA12 are commonly used for USB DM/DP, but I did not create a separate USB group because that would duplicate those pins with GPIO Port A.
PA13/PA14 are commonly used for SWDIO/SWCLK, but I did not create a separate Debug group because that would duplicate those pins with GPIO Port A.
PC13 has tamper/RTC functionality, but it remains under GPIO Port C to avoid duplication.

Grouping rules used
Functional pin groups — no duplicates
Suggested Flux properties
Notes