16-bit MSP430 MCU for low-power control applications
The Texas Instruments MSP430F1121AIDGVR is a 16-bit RISC microcontroller from the MSP430x1xx series. It runs at 8 MHz and integrates 4 KB of Flash program memory with 256 x 8 bytes of RAM, 14 general-purpose I/O lines, and an internal oscillator. The device operates from 1.8 V to 3.6 V and is specified over the -40°C to 85°C industrial temperature range.
8 MHz core — what it means for timing and power
4 KB Flash and 256-byte RAM — sizing the firmware budget
The 4 KB Flash (organized as 4K x 8 plus 256 bytes) is the non-volatile store for application code and constant tables. 256 bytes of RAM is tight — enough for a few sensor readings, a small state machine, and a communication buffer. Designs that need larger data arrays or a real-time OS will outgrow this part; it fits best in dedicated single-function controllers like a thermostat, a PIR sensor node, or a simple keypad interface.
Industrial temperature grade and supply range
The -40°C to 85°C operating range covers most industrial, automotive cabin, and outdoor telecom enclosures. The 1.8 V to 3.6 V supply span lets the MCU run directly from two alkaline cells or a single Li-ion cell without a regulator, which simplifies the power chain in portable designs. Slope A/D conversion is available for ratiometric measurements without an external ADC.