Renesas R9A02G0214CNK#UA0

Overview

R9A02G0214CNK#UA0 from Renesas is a 32-bit RISC-V microcontroller designed for ultra-low-power industrial applications, featuring a 48 MHz Renesas RISC-V core (RV32I + M/A/C/Zifencei/Ziscr/Zba/Zbb/Zbs), 128 KB code flash, 16 KB SRAM (12 KB parity + 4 KB ECC), 12-bit ADC with 6 input channels, dual 8-bit DACs, and integrated safety features including SRAM ECC, CAC, CRC, DOC, TRNG, and IWDT. It operates across -40°C to +125°C in a 24-pin HWQFN package.

For engineers reviewing the R9A02G0214CNK#UA0 datasheet, R9A02G0214CNK#UA0 pinout, R9A02G0214CNK#UA0 application, or R9A02G0214CNK#UA0 equivalent, key selection considerations include its 24-pin HWQFN footprint, 6-channel ADC support, absence of sub-clock oscillator and REMC, limited SAU (3 simplified SPI / 3 UART / 3 simplified I2C), and reduced TAU count (8 channels) versus larger variants - critical for space-constrained, safety-aware sensor node and motor control designs.

Technical Context

This MCU implements a machine-mode-only RISC-V RV32I core with full M/A/C/Zifencei/Ziscr/Zba/Zbb/Zbs extensions, dynamic branch prediction, and cJTAG debug interface. Its safety architecture includes hardware-accelerated CRC and DOC units, independent watchdog timer (IWDT) with dedicated 15 kHz oscillator, and register write protection via PRCR.

Power management integrates Event Link Controller (ELC) for CPU-free peripheral triggering, Data Transfer Controller (DTC) for interrupt-driven DMA, and multiple low-power modes. Clocking supports HOCO/MOCO/LOCO with trim, EXTAL (1–20 MHz), and SOSC (32.768 kHz) - though SOSC is omitted in the R9A02G0214CNK variant per Table 1.11.

Key Specifications

Pinout & Package

Package: 24-pin HWQFN (4 mm × 4 mm, 0.5 mm pitch), moisture sensitivity level (MSL) 3, Pb-free, Sn-only plating (Tray, bulk).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RISC-V microcontroller applications.

Compared with R9A02G0214CNH#UA0 and R9A02G0214CNE#UA0, the R9A02G0214CNK#UA0 trades peripheral count and oscillator options for minimal footprint and BOM cost - ideal when only core RISC-V compute, basic analog I/O, and safety essentials are required in space-limited industrial nodes.

Availability

R9A02G0214CNK#UA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart motor controllers, functional safety PLC modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R9A02G0214CNK#UA0 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

Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.

The R9A02G021 series is part of Renesas' RISC-V-based RA2E2 group, engineered specifically for ultra-low-power, safety-conscious industrial and consumer edge devices demanding high integration, robustness, and long-term supply assurance.

FAQ

What is the maximum operating frequency of the R9A02G0214CNK#UA0?

The R9A02G0214CNK#UA0 operates at a maximum frequency of 48 MHz using its Renesas-optimized RISC-V core. This frequency is achievable across the full industrial temperature range (-40°C to +125°C) and supply voltage (1.6 V to 5.5 V), enabling deterministic real-time performance for motor control, sensor processing, and communication stacks without thermal throttling.

Does the R9A02G0214CNK#UA0 include a sub-clock oscillator (SOSC)?

No, the R9A02G0214CNK#UA0 does not include a sub-clock oscillator. As confirmed in Table 1.11 of the R01DS0422EJ0110 datasheet, SOSC is explicitly marked "No" for this 24-pin variant. Applications requiring precise 32.768 kHz timing must use an external crystal or rely on the HOCO/MOCO/LOCO oscillators with calibration via CAC.

How many analog input channels does the ADC12 support on the R9A02G0214CNK#UA0?

The R9A02G0214CNK#UA0 supports six analog input channels (ANI0–ANI5) for its 12-bit successive approximation ADC12, as specified in Table 1.11. Additional analog-capable pins (ANI16–ANI19) are present but reserved for DAC outputs or comparator references and are not selectable as ADC inputs in this variant.

What safety features are implemented in hardware on the R9A02G0214CNK#UA0?

The R9A02G0214CNK#UA0 integrates multiple hardware safety features: SRAM parity/ECC error checking, flash area protection, Clock Frequency Accuracy Measurement Circuit (CAC), Cyclic Redundancy Check (CRC) calculator, Data Operation Circuit (DOC), True Random Number Generator (TRNG), Independent Watchdog Timer (IWDT), illegal memory access detection, and register write protection via PRCR - all documented in Section 1.1 and Table 1.11 of the datasheet.

Is the R9A02G0214CNK#UA0 pin-compatible with other members of the R9A02G021 family?

No, the R9A02G0214CNK#UA0 is not pin-compatible with other R9A02G021 variants. It uses a 24-pin HWQFN package (PWQN0024KG-A), while R9A02G0214CNH#UA0 uses 32-pin and R9A02G0214CNE#UA0 uses 48-pin packages. Pin assignments differ significantly across variants, and shared signal names (e.g., P000) map to different physical pins - requiring unique PCB layouts for each.