EFR32BG21A010F1024IM32-BR

@@ -0,0 +1,73 @@+# EFR32BG21A010F1024IM32-BR++**SILICON LABS** · RF Transceiver ICs · QFN-32-EP(4x4)++EFR32BG21A010F1024IM32-BR from SILICON LABS, in a QFN-32-EP(4x4). 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 | PC00 | bidirectional | General-purpose I/O on Port C, bit 0. Alternate function: EM4WU6 (EM4 wake-up input 6). |+| 2 | PC01 | bidirectional | General-purpose I/O on Port C, bit 1. |+| 3 | PC02 | bidirectional | General-purpose I/O on Port C, bit 2. |+| 4 | PC03 | bidirectional | General-purpose I/O on Port C, bit 3. |+| 5 | PC04 | bidirectional | General-purpose I/O on Port C, bit 4. |+| 6 | PC05 | bidirectional | General-purpose I/O on Port C, bit 5. Alternate function: EM4WU7 (EM4 wake-up input 7). |+| 7 | HFXTAL_I | input | High Frequency Crystal Oscillator input. Connect one terminal of the HF crystal here. |+| 8 | HFXTAL_O | output | High Frequency Crystal Oscillator output. Connect the other terminal of the HF crystal here. |+| 9 | RESETn | input | Active-low device reset input. Drive low to hold the chip in reset; internal pull-up is present. |+| 10 | RFVDD | power_in | Radio (transceiver) power supply. Nominal 1.8-3.8 V; decouple locally per reference design. |+| 11 | RFVSS | power_in | Radio ground return. Tie to the PCB ground plane. |+| 12 | RF2G4_IO2 | bidirectional | 2.4 GHz RF input/output (differential half). Connect to the matching / balun network for the 2.4 GHz antenna path. |+| 13 | RF2G4_IO1 | bidirectional | 2.4 GHz RF input/output (differential half). Connect to the matching / balun network for the 2.4 GHz antenna path. |+| 14 | PAVDD | power_in | Power Amplifier (PA) supply. Nominal 1.8-3.8 V; sets TX output-power headroom (10 dBm on the -B/-BR OPN). |+| 15 | PB01 | bidirectional | General-purpose I/O on Port B, bit 1. Alternate function: EM4WU3 (EM4 wake-up input 3). |+| 16 | PB00 | bidirectional | General-purpose I/O on Port B, bit 0. |+| 17 | PA00 | bidirectional | General-purpose I/O on Port A, bit 0. |+| 18 | PA01 | bidirectional | General-purpose I/O on Port A, bit 1. Default Serial Wire Debug clock (SWCLK). |+| 19 | PA02 | bidirectional | General-purpose I/O on Port A, bit 2. Default Serial Wire Debug data I/O (SWDIO). |+| 20 | PA03 | bidirectional | General-purpose I/O on Port A, bit 3. Alternate functions: SWV / TDO / TRACEDATA0. |+| 21 | PA04 | bidirectional | General-purpose I/O on Port A, bit 4. Alternate functions: TDI / TRACECLK. |+| 22 | PA05 | bidirectional | General-purpose I/O on Port A, bit 5. Alternate function: EM4WU0 (EM4 wake-up input 0). |+| 23 | PA06 | bidirectional | General-purpose I/O on Port A, bit 6. |+| 24 | DECOUPLE | passive | Decouple output for the on-chip core voltage regulator. An external decoupling capacitor (per reference design) is required from this pin to VSS - do not load with any other supply. |+| 25 | DVDD | power_in | Digital core power supply. Nominal 1.8-3.8 V; decouple locally per reference design. |+| 26 | AVDD | power_in | Analog power supply for on-chip analog blocks (IADC, ACMP, oscillators). Nominal 1.8-3.8 V. |+| 27 | IOVDD | power_in | Digital I/O power supply. Sets the drive/receive level for the GPIO pads; nominal 1.8-3.8 V. |+| 28 | PD04 | bidirectional | General-purpose I/O on Port D, bit 4. |+| 29 | PD03 | bidirectional | General-purpose I/O on Port D, bit 3. |+| 30 | PD02 | bidirectional | General-purpose I/O on Port D, bit 2. Alternate function: EM4WU9 (EM4 wake-up input 9). |+| 31 | PD01 | bidirectional | General-purpose I/O on Port D, bit 1. Alternate functions: LFXO.LFXTAL_I / LFXO.LF_EXTCLK (Low Frequency crystal input or external LF clock input). |+| 32 | PD00 | bidirectional | General-purpose I/O on Port D, bit 0. Alternate function: LFXO.LFXTAL_O (Low Frequency crystal output). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | SILICON LABS |+| Package | QFN-32-EP(4x4) |+| Category | Radio Frequency Chip/Antenna |+| Pins | 32 |++## Ordering variants++Same part, different packaging or reel option.++- `EFR32BG21A010F1024IM32-BR`++## CAD (KiCad official)++- Symbol: `EFR32BG21A010F1024IM32-BR`+- Footprint: `Package_DFN_QFN:QFN-32-1EP_4x4mm_P0.4mm_EP2.9x2.9mm`+- 3D model: QFN-32-EP(4x4) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [SILICON LABS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588943065603694592) (None pp, sha256 `f8bfff6a1733a68d`, 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](docs/efr32bg21a010f1024im32-br-datasheet.pdf)

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