Texas Instruments MSP430G2432IPW14R

Overview

MSP430G2432IPW14R from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 8 KB flash, 256 B RAM, a 10-bit 200-ksps ADC with internal reference and autoscan, one 16-bit Timer_A with three capture/compare registers, USI supporting SPI and I2C, and up to 10 capacitive-touch enabled I/O pins in a 14-pin TSSOP package. It targets battery-powered sensor nodes and portable measurement systems requiring sub-1-µs wake-up and <0.1 µA off-mode current.

For engineers reviewing the MSP430G2432IPW14R datasheet, MSP430G2432IPW14R pinout, MSP430G2432IPW14R application, or MSP430G2432IPW14R equivalent, key selection criteria include its 10-bit ADC channel count, 14-pin TSSOP footprint with only two P2 I/O pins, Spy-Bi-Wire debug interface, brownout detection, and calibrated DCO clock source enabling operation from 1.8 V to 3.6 V without external crystal.

Technical Context

The MSP430G2432IPW14R implements a 16-bit RISC CPU with seven addressing modes and 51 instructions, integrated with a basic clock module providing ACLK, MCLK, and SMCLK from internal DCO (calibrated at 1/8/12/16 MHz), LF oscillator, or 32-kHz crystal. Its ADC10 module supports eight analog inputs (A0–A7), internal 1.5-V/2.5-V reference, sample-and-hold, and DMA-assisted data transfer - all confirmed for the G2x32 family and present in this 14-pin variant.

Power management includes five software-selectable low-power modes (LPM0–LPM4), with LPM4 drawing only 0.1 µA while retaining RAM. Wake-up from standby occurs in less than 1 µs via interrupt on any of eight P1 I/O pins or USI/ADC/TIMER events. The device uses Spy-Bi-Wire for on-chip emulation and programming, eliminating need for external voltage.

Key Specifications

Pinout & Package

Package: 14-pin TSSOP (PW14), 5.0 mm × 4.4 mm body, 0.65 mm lead pitch, thermal pad not present. Pin functions validated per TI SLAS723H Table 2 and PW package top-view diagram.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mixed-signal microcontroller applications.

Compared with MSP430G2432IPW14R, the MSP430G2553IPW20R offers greater memory and UART capability at the cost of size and power, while the MSP430FR2355TRHBR shifts to FRAM and advanced analog but abandons the ultra-low-pin-count advantage and legacy ADC10 compatibility.

Availability

MSP430G2432IPW14R is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical monitors, industrial control panels, and energy harvesting IoT endpoints requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for MSP430G2432IPW14R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The MSP430G2xx series was designed specifically for ultra-low-power embedded sensing and measurement applications where battery life, small form factor, and integrated analog functionality are critical design constraints.

FAQ

What is the maximum ADC sampling rate supported by the MSP430G2432IPW14R?

The MSP430G2432IPW14R supports a maximum ADC10 sampling rate of 200 ksps (kilo-samples per second) with internal reference and autoscan enabled. This specification is confirmed in the SLAS723H datasheet Section 1 "Features" and applies specifically to the MSP430G2x32 family, including the MSP430G2432IPW14R variant in 14-pin TSSOP packaging.

Does the MSP430G2432IPW14R include hardware UART support?

No, the MSP430G2432IPW14R does not include hardware UART. It features the Universal Serial Interface (USI), which supports SPI and I²C protocols only. UART functionality must be implemented in firmware using timer-based bit-banging or by adding an external UART-to-SPI bridge IC. This limitation is consistent across all MSP430G2x32 devices per the functional block diagram and peripheral listing in SLAS723H.

How many I/O pins with ADC capability does the MSP430G2432IPW14R provide?

The MSP430G2432IPW14R provides eight ADC-capable I/O pins: P1.0 (A0), P1.1 (A1), P1.2 (A2), P1.3 (A3), P1.4 (A4), P1.5 (A5), P1.6 (A6), and P1.7 (A7). These are explicitly listed in Table 2 "Terminal Functions" of SLAS723H and confirmed as available only on MSP430G2x32 devices - a feature retained in the 14-pin PW package variant.

What debug interface does the MSP430G2432IPW14R use, and how many pins are required?

The MSP430G2432IPW14R uses the Spy-Bi-Wire (SBW) debug interface, requiring only two pins: RST/NMI/SBWTDIO (Pin 10) and TEST/SBWTCK (Pin 11). This two-wire interface replaces full 4-wire JTAG, reducing PCB routing complexity and test point count while supporting full in-circuit emulation, flash programming, and breakpoint debugging as documented in SLAS723H Section "On-Chip Emulation Logic With Spy-Bi-Wire Interface".

Is the MSP430G2432IPW14R compatible with the MSP430G2553IPW20R in terms of software and peripheral register mapping?

Software and peripheral register mapping for core modules (Timer_A, USI, GPIO, ADC10, clock system) is largely compatible between MSP430G2432IPW14R and MSP430G2553IPW20R due to shared MSP430x2xx family architecture and register definitions in SLAU144. However, differences exist in memory map size, interrupt vector locations, and USI vs. USCI register fields - requiring minor code adjustments for migration. No pin compatibility exists due to differing package sizes and pin assignments.