# MSP430F2131TPWR

**Texas Instruments** · Microcontrollers (MCU/MPU/SOC) · TSSOP-20

MSP430F2131TPWR from Texas Instruments, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | TEST | input | Selects test mode for the JTAG pins on Port 1, and the device protection fuse is connected to this pin. |
| 2 | VCC | power_in | Supply voltage; the device operates over the low supply voltage range of 1.8 V to 3.6 V stated in the features. |
| 3 | P2.5/CA5 | bidirectional | General-purpose digital I/O pin, also the Comparator_A+ CA5 input. |
| 4 | VSS | power_in | Ground reference. |
| 5 | XOUT/P2.7/CA7 | bidirectional | Output terminal of the crystal oscillator, also general-purpose I/O and Comparator_A+ CA7 input; if used as an input, excess current flows until P2SEL.7 is cleared because of the oscillator output driver connection after reset. |
| 6 | XIN/P2.6/CA6 | bidirectional | Input terminal of the crystal oscillator, also general-purpose I/O and Comparator_A+ CA6 input. |
| 7 | RST/NMI | input | Reset or nonmaskable interrupt input. |
| 8 | P2.0/ACLK/CA2 | bidirectional | General-purpose digital I/O pin with ACLK output, also Comparator_A+ CA2 input. |
| 9 | P2.1/INCLK/CA3 | bidirectional | General-purpose digital I/O pin with Timer_A INCLK clock input, also Comparator_A+ CA3 input. |
| 10 | P2.2/CAOUT/TA0/CA4 | bidirectional | General-purpose digital I/O pin with Timer_A CCI0B input and BSL receive, also Comparator_A+ output and CA4 input. |
| 11 | P2.3/TA1/CA0 | bidirectional | General-purpose digital I/O pin with Timer_A compare Out1 output, also Comparator_A+ CA0 input. |
| 12 | P2.4/TA2/CA1 | bidirectional | General-purpose digital I/O pin with Timer_A compare Out2 output, also Comparator_A+ CA1 input. |
| 13 | P1.0/TACLK | bidirectional | General-purpose digital I/O pin, also Timer_A clock input TACLK. |
| 14 | P1.1/TA0 | bidirectional | General-purpose digital I/O pin with Timer_A CCI0A input and Out0 output, also BSL transmit. |
| 15 | P1.2/TA1 | bidirectional | General-purpose digital I/O pin with Timer_A CCI1A input and Out1 output. |
| 16 | P1.3/TA2 | bidirectional | General-purpose digital I/O pin with Timer_A CCI2A input and Out2 output. |
| 17 | P1.4/SMCLK/TCK | bidirectional | General-purpose digital I/O pin, also SMCLK signal output and test clock input TCK for device programming and test. |
| 18 | P1.5/TA0/TMS | bidirectional | General-purpose digital I/O pin, also Timer_A Out0 output and test mode select input TMS for device programming and test. |
| 19 | P1.6/TA1/TDI/TCLK | bidirectional | General-purpose digital I/O pin, also Timer_A Out1 output and JTAG test data input or test clock input for programming and test. |
| 20 | P1.7/TA2/TDO/TDI | bidirectional | General-purpose digital I/O pin, also Timer_A Out2 output and JTAG test data output or test data input; TDO or TDI is selected via JTAG instruction. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Embedded Processors & Controllers |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `MSP430F2131TPWR`
- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`
- 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files: `msp430f2131tpwr-etched.step` / `msp430f2131tpwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msp430f2131tpwr.step` / `msp430f2131tpwr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/msp430f2131) (68 pp, sha256 `0997b19db742fa9b`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/msp430f2131tpwr-datasheet.pdf)