STMicroelectronics STEVAL-IKR002V5D

Overview

STEVAL-IKR002V5D from STMicroelectronics is an SPIRIT1-based 915 MHz RF daughterboard evaluation platform supporting 2-FSK/GFSK/MSK/GMSK/OOK/ASK modulation, programmable data rates from 1–500 kbps, −108 dBm receiver sensitivity, and AES-128 encryption - designed for rapid prototyping of low-power sub-GHz wireless sensor nodes in industrial telemetry.

For engineers reviewing the STEVAL-IKR002V5D datasheet, STEVAL-IKR002V5D pinout, STEVAL-IKR002V5D application, or STEVAL-IKR002V5D equivalent, key selection criteria include SPIRIT1 transceiver integration, 915 MHz band tuning, low-duty-cycle RX/TX operation, embedded protocol engine support, and RoHS-compliant board-level form factor.

Technical Context

The board implements the SPIRIT1 (SPM1001) transceiver IC in a fixed 915 MHz configuration with external crystal (NX3225GA), matching network (L/C components), and configurable GPIO routing. It supports full SPI register access via SDO/SDI/SCLK/CSn and includes dedicated VBAT1/VBAT2 power domains for analog/digital sections.

Its protocol engine handles automatic ACK, retransmission, and timeout without MCU intervention, while the integrated AES-128 co-processor enables secure payload encryption at the transceiver level - both accessible through SPI command registers and verified in ST's AN4471 and UM1748 application notes.

Key Specifications

Availability

STEVAL-IKR002V5D is available at Aetrix Electronics and suitable for industrial telemetry, smart metering, building automation, and asset tracking requiring stable component supply and validated RF reference design.

Supply support for STEVAL-IKR002V5D 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, delivering microcontrollers, analog ICs, MEMS, and power solutions for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) platform family, engineered to accelerate RF subsystem validation and reduce time-to-prototype for sub-GHz wireless designs using SPIRIT1 and similar transceivers.

FAQ

What microcontroller interfaces are supported on the STEVAL-IKR002V5D?

The board uses a standard 4-wire SPI interface (SDO, SDI, SCLK, CSn) compatible with any MCU supporting SPI master mode at up to 10 MHz clock rate. GPIO0–GPIO3 are routed to headers for interrupt handling, status signaling, or custom control logic - no UART or I²C bridging is implemented.

Does the STEVAL-IKR002V5D include an antenna?

Yes - it integrates a 915 MHz monopole PCB trace antenna with 50 Ω impedance matching, optimized for vertical orientation and free-space use. The antenna layout is documented in Figure 1 of UM1748 and requires no external components for basic operation.

Can the board operate at other frequencies like 868 MHz or 433 MHz?

No - the matching network (L2, L3, C1, C2, etc.) and crystal (NX3225GA-915MHz) are fixed for 915 MHz. ST provides separate daughterboards (e.g., STEVAL-IKR002V3 for 868 MHz) with band-specific layouts; swapping components is not validated or recommended.

Is the AES-128 encryption engine accessible directly via SPI commands?

Yes - the SPIRIT1 transceiver exposes AES-128 registers (e.g., AES_KEYx, AES_CTRL) via its SPI interface. Encryption/decryption is performed in hardware upon write to AES_START; no firmware library is required, and keys remain isolated from host memory per ST's security architecture.