C8051F310-GQR from SKYWORKS SILICON LABS, in a LQFP-32(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	P0.1	bidirectional	Port 0.1. Digital I/O, 5 V tolerant with high sink current. Crossbar-configurable to peripheral functions (UART, SMBus, SPI, PCA, timers, comparator).
2	P0.0/VREF	bidirectional	Port 0.0 (digital I/O) muxed with external VREF input for the 10-bit ADC (F310/1/2/3 only).
3	GND	power_in	Ground reference (0 V).
4	VDD	power_in	Power supply voltage input, 2.7 V to 3.6 V.
5	/RST/C2CK	bidirectional	Active-low device reset (open-drain output of internal POR; external source can pull low >=10 us to reset) muxed with C2 debug clock.
6	P3.0/C2D	bidirectional	Port 3.0 digital I/O muxed with C2 debug bidirectional data.
7	P3.1	bidirectional	Port 3.1. Digital I/O or analog input, 5 V tolerant.
8	P3.2	bidirectional	Port 3.2. Digital I/O or analog input, 5 V tolerant.
9	P3.3	bidirectional	Port 3.3. Digital I/O or analog input, 5 V tolerant.
10	P3.4	bidirectional	Port 3.4. Digital I/O or analog input, 5 V tolerant.
11	P2.7	bidirectional	Port 2.7. Digital I/O or analog input, 5 V tolerant.
12	P2.6	bidirectional	Port 2.6. Digital I/O or analog input, 5 V tolerant.
13	P2.5	bidirectional	Port 2.5. Digital I/O or analog input, 5 V tolerant.
14	P2.4	bidirectional	Port 2.4. Digital I/O or analog input, 5 V tolerant.
15	P2.3	bidirectional	Port 2.3. Digital I/O or analog input, 5 V tolerant.
16	P2.2	bidirectional	Port 2.2. Digital I/O or analog input, 5 V tolerant.
17	P2.1	bidirectional	Port 2.1. Digital I/O or analog input, 5 V tolerant.
18	P2.0	bidirectional	Port 2.0. Digital I/O or analog input, 5 V tolerant.
19	P1.7	bidirectional	Port 1.7. Digital I/O or analog input, 5 V tolerant.
20	P1.6	bidirectional	Port 1.6. Digital I/O or analog input, 5 V tolerant.
21	P1.5	bidirectional	Port 1.5. Digital I/O or analog input, 5 V tolerant.
22	P1.4	bidirectional	Port 1.4. Digital I/O or analog input, 5 V tolerant.
23	P1.3	bidirectional	Port 1.3. Digital I/O or analog input, 5 V tolerant.
24	P1.2	bidirectional	Port 1.2. Digital I/O or analog input, 5 V tolerant.
25	P1.1	bidirectional	Port 1.1. Digital I/O or analog input, 5 V tolerant.
26	P1.0	bidirectional	Port 1.0. Digital I/O or analog input, 5 V tolerant.
27	P0.7	bidirectional	Port 0.7. Digital I/O, 5 V tolerant, crossbar-configurable to peripherals.
28	P0.6/CNVSTR	bidirectional	Port 0.6 digital I/O muxed with ADC0 external convert-start input (F310/1/2/3 only).
29	P0.5	bidirectional	Port 0.5. Digital I/O, 5 V tolerant, crossbar-configurable to peripherals.
30	P0.4	bidirectional	Port 0.4. Digital I/O, 5 V tolerant, crossbar-configurable to peripherals.
31	P0.3/XTAL2	bidirectional	Port 0.3 digital I/O muxed with XTAL2 external oscillator drive (analog output for crystal/resonator, digital input for CMOS/capacitor/RC oscillator configurations).
32	P0.2/XTAL1	bidirectional	Port 0.2 digital I/O muxed with XTAL1 external oscillator return (analog input for crystal or resonator).

Key specifications

Parameter	Value
Manufacturer	SKYWORKS SILICON LABS
Package	LQFP-32(7x7)
Category	MCU
Pins	32

Ordering variants

Same part, different packaging or reel option.

C8051F310-GQR
C8051F310-GQRGM

CAD (KiCad official)

Symbol: C8051F310-GQR
Footprint: Package_QFP:LQFP-32_7x7mm_P0.8mm
3D model: LQFP-32(7x7) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`c8051f310-gqr.step`	413 KB	You want the bare part, or you mark your own boards.
`c8051f310-gqr-etched.step`	4.1 MB	You want the part with `C8051F310-GQR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 996 faces against 507 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: SKYWORKS SILICON LABS datasheet (228 pp, sha256 09bdc805bdb99508, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF