Texas Instruments MSP430G2232IPW20R

Overview

MSP430G2232IPW20R from Texas Instruments is an ultra-low-power 16-bit RISC mixed-signal microcontroller featuring 2 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/I²C, and up to 8 capacitive-touch-enabled I/O pins in a 20-pin TSSOP package. It targets battery-powered sensor nodes and portable measurement systems requiring sub-µA standby current.

For engineers reviewing the MSP430G2232IPW20R datasheet, MSP430G2232IPW20R pinout, MSP430G2232IPW20R application, or MSP430G2232IPW20R equivalent, key selection criteria include its 2 kB flash/256 B RAM configuration, ADC10 channel count (2-channel), low-power operating modes (LPM4 at 0.1 µA), Spy-Bi-Wire debug interface, and TSSOP-20 package compatibility with legacy MSP430G2x32 designs.

Technical Context

The MSP430G2232IPW20R implements a 16-bit CPU with seven addressing modes and 51 instructions, integrated with a basic clock module offering DCO (calibrated at 1/8/12/16 MHz), LF oscillator, and 32-kHz crystal support. Its ADC10 uses a SAR architecture with internal 1.5-V/2.5-V reference, sample-and-hold, and autoscan across two analog inputs (A0–A1).

Timer_A3 provides three capture/compare registers for PWM generation, input capture, and interval timing; USI handles synchronous serial communication via programmable SPI or I²C protocols; and digital I/O includes individually configurable pullup/pulldown resistors and pin-oscillator enable for capacitive touch on P1.x pins.

Key Specifications

Pinout & Package

Package: 20-pin TSSOP (PW), 0.65 mm pitch, body size 6.5 × 4.4 mm, thermal pad optional. Pinout validated per TI SLAS723H datasheet Figure 1 (PW PACKAGE top view) and Table 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MSP430G2332IPW20 and MSP430FR2132IPW20, the MSP430G2232IPW20R offers optimal cost/performance balance for fixed-function sensor nodes where 2 kB flash and dual-channel ADC meet requirements without over-provisioning memory or adopting FRAM-specific development flows.

Availability

MSP430G2232IPW20R is available at Aetrix Electronics and suitable for smart sensor nodes, portable medical monitors, industrial HMI panels, and energy harvesting nodes requiring stable component supply and long-term manufacturability.

Supply support for MSP430G2232IPW20R 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 specializing in analog, embedded processing, and connectivity technologies with over 50 years of innovation in low-power design.

The MSP430G2xx family was engineered for ultra-low-power portable instrumentation and sensor applications, emphasizing sub-µA sleep currents, integrated analog peripherals, and rapid wake-up for event-driven operation.

FAQ

What is the maximum ADC sampling rate supported by the MSP430G2232IPW20R?

The MSP430G2232IPW20R ADC10 module supports up to 200 ksps (kilo-samples per second) with 10-bit resolution. This rate is achievable when using the internal DCO clock at 5 MHz and configuring the ADC10CLK divider appropriately. The actual sustained rate depends on system clock setup and conversion mode (single vs. autoscan), but 200 ksps represents the documented maximum throughput specified in the SLAS723H datasheet for the MSP430G2x32 series.

Does the MSP430G2232IPW20R support capacitive touch sensing on all port pins?

No, the MSP430G2232IPW20R supports capacitive touch sensing only on P1.0 through P1.7 - eight pins total - via its built-in pin-oscillator circuitry. Port P2 pins do not support this function. Enabling touch requires setting the appropriate P1SEL and P1DIR bits and configuring the pin-oscillator control register (PCCTL), as detailed in the MSP430x2xx Family User's Guide (SLAU144).

What debug interface does the MSP430G2232IPW20R use, and what hardware is required?

The MSP430G2232IPW20R uses the Spy-Bi-Wire (SBW) interface, a 2-wire subset of JTAG implemented on pins RST/NMI/SBWTDIO (Pin 16) and TEST/SBWTCK (Pin 17). Programming and debugging require a TI MSP-FET programmer or compatible SBW adapter; no external voltage is needed, as the device supports on-chip emulation and flash programming directly from the SBW interface.

Can the MSP430G2232IPW20R operate from a 1.8-V supply while running at 16 MHz?

No. According to the SLAS723H datasheet, the MSP430G2232IPW20R supports 16 MHz operation only at VCC ≥ 2.2 V. At 1.8 V, the maximum allowed system frequency is 1 MHz. The DCO calibration values stored in information memory segment A are valid only within the specified voltage-frequency envelope, and exceeding it risks timing violations or unstable operation.

How many analog input channels does the ADC10 module support on the MSP430G2232IPW20R?

The MSP430G2232IPW20R ADC10 module supports two analog input channels: A0 (on P1.0) and A1 (on P1.1), as confirmed by Table 1 in the SLAS723H datasheet and the "ADC10" column indicating "2" for the MSP430G2232 device variant. While other pins (e.g., A3–A7) appear in the pinout table, they are not functional as ADC inputs on this specific part - only A0 and A1 are enabled per the device's silicon configuration.