Texas Instruments has marked the MSP430F6458IPZR as Obsolete. This means the manufacturer no longer produces the device through its standard production lines.
Core architecture and memory — 384KB Flash, 34KB RAM
The MSP430F6458IPZR is built around the 16-bit MSP430 CPUXV2 core clocked at 20MHz. This is the same von-Neumann architecture used across the MSP430F6xx family, with a unified memory map that simplifies code and data access. Program memory is 384KB of on-chip Flash, and the SRAM is 34K x 8 — roughly 34KB. For a metering or HMI application running a real-time operating system, the Flash holds the full firmware image plus a small bootloader partition; the RAM leaves about 8–10KB for the stack and dynamic data after the HAL and driver layer footprint.
I/O and peripherals — 74 pins, LCD driver, 16-channel ADC
With 74 general-purpose I/O lines, this MCU can interface to a keypad matrix, a segment LCD, and several external sensors without needing a port expander. The peripheral set includes a brown-out detect/reset, DMA controller, LCD driver, POR, PWM, and watchdog timer. The LCD driver is a notable inclusion — it drives up to 320 segments directly, which suits utility-meter or thermostat displays. Connectivity covers I²C, IrDA, SCI, SPI, and UART/USART, so the device can talk to serial sensors, wireless modules, or a host processor over a standard bus.
On-chip data converters — 12-bit ADC and DAC
The MSP430F6458IPZR integrates a 16-channel 12-bit successive-approximation ADC and a 2-channel 12-bit DAC. The ADC multiplexes across 16 analog inputs — enough to sample multiple sensor voltages (thermistor, pressure transducer, current shunt) without an external mux. The DAC outputs can generate analog setpoints or bias voltages. For a battery-powered data logger, the ADC's 12-bit resolution gives 4.88 mV per step at a 3.0V reference, which is adequate for 0.5% accuracy on a 1V sensor span.
The supply voltage range is 1.8V to 3.6V, which covers two alkaline cells in series (3.0V fresh) or a single Li-ion cell (3.6V full). This means the device is rated for outdoor enclosures, unheated factory floors, or engine-bay-adjacent compartments where ambient temperature stays below 85°C. The 100-LQFP package (14x14mm) is a standard surface-mount footprint with 0.5mm pitch, reflow-compatible with lead-free solder profiles.