# MSP430F2131IPWR

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

MSP430F2131IPWR 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 | Test mode select input for JTAG pins on Port1; device protection fuse connection point. |
| 2 | VCC | power_in | Positive power supply input with operating range 1.8 V to 3.6 V. |
| 3 | P2.5/CA5 | bidirectional | Port 2 bit 5 general-purpose digital I/O; Comparator_A+ channel 5 input. |
| 4 | VSS | power_in | Ground reference (0 V). |
| 5 | XOUT/P2.7/CA7 | bidirectional | Crystal oscillator output terminal; Port 2 bit 7 general-purpose digital I/O; Comparator_A+ channel 7 input; excess current may flow if used as input until P2SEL.7 is cleared. |
| 6 | XIN/P2.6/CA6 | bidirectional | Crystal oscillator input terminal; Port 2 bit 6 general-purpose digital I/O; Comparator_A+ channel 6 input. |
| 7 | RST/NMI | input | Active-low reset signal input or nonmaskable interrupt input. |
| 8 | P2.0/ACLK/CA2 | bidirectional | Port 2 bit 0 general-purpose digital I/O; ACLK output; Comparator_A+ channel 2 input. |
| 9 | P2.1/INCLK/CA3 | bidirectional | Port 2 bit 1 general-purpose digital I/O; Timer_A clock signal input; Comparator_A+ channel 3 input. |
| 10 | P2.2/CAOUT/TA0/CA4 | bidirectional | Port 2 bit 2 general-purpose digital I/O; Timer_A capture input CCI0B and BSL receive; Comparator_A+ output; Comparator_A+ channel 4 input. |
| 11 | P2.3/TA1/CA0 | bidirectional | Port 2 bit 3 general-purpose digital I/O; Timer_A compare output TA1; Comparator_A+ channel 0 input. |
| 12 | P2.4/TA2/CA1 | bidirectional | Port 2 bit 4 general-purpose digital I/O; Timer_A compare output TA2; Comparator_A+ channel 1 input. |
| 13 | P1.0/TACLK | bidirectional | Port 1 bit 0 general-purpose digital I/O; Timer_A clock signal input TACLK. |
| 14 | P1.1/TA0 | bidirectional | Port 1 bit 1 general-purpose digital I/O; Timer_A capture input CCI0A and compare output; BSL transmit function. |
| 15 | P1.2/TA1 | bidirectional | Port 1 bit 2 general-purpose digital I/O; Timer_A capture input CCI1A and compare output. |
| 16 | P1.3/TA2 | bidirectional | Port 1 bit 3 general-purpose digital I/O; Timer_A capture input CCI2A and compare output. |
| 17 | P1.4/SMCLK/TCK | bidirectional | Port 1 bit 4 general-purpose digital I/O; SMCLK output; JTAG test clock input for device programming. |
| 18 | P1.5/TA0/TMS | bidirectional | Port 1 bit 5 general-purpose digital I/O; Timer_A compare output; JTAG test mode select input for device programming. |
| 19 | P1.6/TA1/TDI/TCLK | bidirectional | Port 1 bit 6 general-purpose digital I/O; Timer_A compare output; JTAG test data input or test clock input for device programming. |
| 20 | P1.7/TA2/TDO/TDI | bidirectional | Port 1 bit 7 general-purpose digital I/O; Timer_A compare output; JTAG test data output or test data input for device programming. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `MSP430F2131IPWR`
- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`
- 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files: `msp430f2131ipwr-etched.step` / `msp430f2131ipwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msp430f2131ipwr.step` / `msp430f2131ipwr.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 2026-10-07, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/msp430f2131ipwr-datasheet.pdf)