MCU for Metering and IoT

Braemac
2 days ago
2 min read

RAC41 from Renesas

The Renesas RA4C1 is a 32-bit microcontroller (MCU) designed for low-power embedded applications that also require secure data handling and flexible connectivity. It uses an Arm® Cortex®-M33 core running at up to 80 MHz and supports operation down to 1.6 V, making it suitable for battery-powered or energy-constrained devices.

Robust Security

The RA4C1 includes Arm TrustZone® for secure/non-secure separation and a hardware-based security engine that supports AES, ECC, SHA, true random number generation (TRNG), and a unique device ID. These features make it applicable for connected devices that require basic protection of data, firmware, and authentication.

Source: Renesas

RA4C1 Key Features:

80MHz Arm Cortex-M33 with TrustZone
512KB dual bank flash supporting BGO
96KB SRAM with 64KB parity and 32KB ECC
8KB data flash
168µA/MHz active current, 1.73µA standby current
Fast wake-up <3.5µS (from MOCO)
6 SCI (UART, Simple SPI, Simple I²C), SSI
2 x low-power UARTs with 32kHz support
2 x I²C multi-master interface
3 x SPI interfaces

CAN FD
Quad SPI with XIP
32-bit and 16-bit timers, 32-bit ultra-low power timers
2 x watchdog timer
High-precision Real-Time Clock (RTC)
12-bit ADC
Temperature sensor with 1% accuracy
8 x 44 segment LCD drive
Advanced security engine with support for: TRNG, Unique ID, AES, ECC, SHA

RA4C1 Key Applications:

Smart meters: power meters, gas meters, water meters, flow meters
Appliances: small appliances, home appliances
Smart home and building automation: entry systems, intercoms, thermostats, security panels, alarm sensors, smart locks, voice recognition
Office automation: asset management, printer display, QR code readers, fingerprint scanners
Healthcare: heart rate monitors, glucose meters, oximeters, BP monitors, imaging equipment
Voice AI applications

Interested in using the RA4C1 in your next design or need help getting started?

Reach out to info@Braemac.com for more information.