STMicroelectronics’ STLINK-V3PWR is a new in-circuit debugging and programming probe that provides accurate power measurement suitable for applications running on any STM32 microcontroller (MCU).
Having a wide dynamic range to handle power-conscious projects including IoT and wireless applications, the probe measures current values from nanoamps to 500mA and remains accurate up to ±0.5%. It can also supply up to 2A to the target system through a single USB cable, enabling developers to power the board without a separate supply.
“Ultra-low-power microcontroller applications use energy harvesting or run for years on batteries, however small design errors can create unexpected power issues,” said Reinhard Keil, senior director, embedded technology at Arm. “The new STLINK-V3PWR probe enables power profiling with Keil MDK. The µVision debugger can correlate program events with power consumption, providing analysis to help developers identify potential design errors and enabling multifold improvements to battery lifetime.”
STLINK-V3PWR is supported directly within the STM32CubeMonitor-Power graphical tool, which helps visualize the power demands of the application in real-time and analyze the effects of design changes to improve energy efficiency. It is also supported within the Arm Keil development tool and IAR integrated development environment (IDE), which enable users to synchronize code execution with energy-consumption measurements to optimize the application energy profile.
“Full support for the STLINK-V3PWR probe within IAR Embedded Workbench for Arm allows developers faster and easier access to power analysis that is both accurate and repeatable, and with high resolution,” said Anders Holmberg, CTO at IAR. “It is sure to help realize greater energy savings and efficiency gains in next-generation ultra-low-power and ultra-efficient smart, connected devices while also drastically accelerating their time to market.”
STLINK-V3PWR adds further strength to the energy-conscious embedded developer’s toolkit alongside the STM32 Power shield (X-NUCLEO-LPM01A), a programmable power supply source that provides dynamic current measurement from 100nA to 50mA. It’s typically used to analyze applications running on ultra-low-power STM32 MCUs.
Additionally, the energy meter of the STM32L562E-DK Discovery kit intermediate board measures dynamic current from 300nA to 150mA. STM32CubeMonitor-Power acquires power measurements through any of these devices and allows data rendering in real-time and updates of its acquisition parameters.
As a programming and debug probe, STLINK-V3PWR also features single-wire debug (JTAG/SWD) interfaces to communicate with the STM32 MCU on the application board. There’s also a Virtual COM port interface and a multi-path bridge allowing the host PC to communicate with the target microcontroller through a SPI/UART/I2C/CAN/GPIO communication to facilitate firmware update, as well as power-measurement tests in the field.
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