Renesas Electronics RA4W1 32-Bit Microcontroller

Renesas Electronics RA4W1 32-Bit Microcontroller, based on a 48MHz Arm® Cortex®-M4 core, features integrated BLUETOOTH® 5.0 Low Energy (BLE) making it an ideal choice for low-power IoT devices. An on-chip Capacitive Touch Sensing Unit (CTSU) and a Segment LCD Controller (SLCDC) enable simple integration into Human Machine Interface (HMI) applications. Additional features include 512KB code flash memory, 96KB SRAM, 14-bit ADC, 12-bit DAC, and a USB 2.0 Full-Speed (USBFS) module.

The RA4W1 is built on a highly efficient 40nm process and is supported by an open and flexible ecosystem concept, called Flexible Software Package (FSP), using FreeRTOS as a base. The RA4W1 is geared towards IoT applications requiring security, large embedded RAM, and low power consumption.

The RA4W1 MCU is offered in a 7mm x 7mm Quad Flat No-lead (QFN) package, with a -40°C to +85°C operating temperature range.

Features

Arm Cortex-M4 Core with Floating Point Unit (FPU)
- Arm v7E-M architecture with DSP instruction set
- Maximum operating frequency: 48MHz
- Support for 4GB address space
- Arm Memory Protection Unit (Arm MPU) with 8 regions
- Debug and Trace: ITM, DWT, FPB, TPIU, and ETB
- CoreSight™ debug port: JTAG-DP and SW-DP
Memory
- 512KB code flash memory
- 8KB data flash memory
- 96KB SRAM
- Flash Cache (FCACHE)
- Memory Protection Units
- Memory Mirror Function (MMF)
- 128-bit unique ID
Connectivity
- Bluetooth Low Energy
  - Bluetooth 5.0 core specification compliant BLE transceiver and link layer
  - Supporting LE 1M, 2M and Coded PHY, and LE Advertising extension
  - Dedicated AES-CCM (128-bit blocks) encryption circuit
- USB 2.0 Full-Speed (USBFS) module
  - On-chip transceiver
  - Compliant with USB Battery Charging Specification 2
- 4x Serial Communications Interface (SCI)
  - UART
  - Simple IIC
  - Simple SPI
- 2x Serial Peripheral Interface (SPI)
- 2x I²C bus interface (IIC)
Analog
- 14-bit A/D Converter (ADC14)
- 12-bit D/A Converter (DAC12)
- 2x 8-bit D/A Converter (DAC8) for ACMPLP
- 2x Low Power Analog Comparator (ACMPLP)
- Operational Amplifier (OPAMP)
Safety
- Error Correction Code (ECC) in SRAM
- SRAM parity error check
- Flash area protection
- ADC self-diagnosis function
- Clock Frequency Accuracy Measurement Circuit (CAC)
- Cyclic Redundancy Check (CRC) calculator
- Data Operation Circuit (DOC)
- Port Output Enable for GPT (POEG)
- Independent Watchdog Timer (IWDT)
- GPIO readback level detection
- Register write protection
- Main oscillator stop detection
- Illegal memory access

System and Power Management
- Low power modes
- Realtime Clock (RTC) with calendar and Battery Backup support
- Event Link Controller (ELC)
- 4x DMA Controller (DMAC)
- Data Transfer Controller (DTC)
- Key Interrupt Function (KINT)
- Power-on reset
- Low Voltage Detection (LVD) with voltage settings
Security and Encryption
- AES128/256
- GHASH
- True Random Number Generator (TRNG)
Human Machine Interface (HMI)
- Segment LCD Controller (SLCDC)
  - Up to 9 segments x 4 commons
- Capacitive Touch Sensing Unit (CTSU)
Timers
- 4x General PWM Timer 32-bit (GPT32)
- 3x General PWM Timer 16-bit (GPT16)
- 2x Asynchronous General-Purpose Timer (AGT)
- Watchdog Timer (WDT)
Multiple Clock Sources
- Main clock oscillator (MOSC)
  - 1MHz to 20MHz when V_CC = 2.4V to 3.6V
  - 1MHz to 8MHz when V_CC = 1.8V to 2.4V
- Sub-clock oscillator (SOSC) (32.768kHz)
- High-speed on-chip oscillator (HOCO)
  - 24/32/48/64MHz when V_CC = 2.4V to 3.6V
  - 24/32/48MHz when V_CC = 1.8V to 3.6V
- Middle-speed on-chip oscillator (MOCO) (8MHz)
- Low-speed on-chip oscillator (LOCO) (32.768kHz)
- IWDT-dedicated on-chip oscillator (15kHz)
- Clock trim function for HOCO/MOCO/LOCO
- Clock out support
General Purpose I/O Ports
- Up to 35 input/output pins
  - Up to 3 CMOS input
  - Up to 32 CMOS input/output
  - Up to 3 input/output 5V tolerant
  - Up to 1 high current (20mA)
1.8V to 3.6V operating voltage
-40°C to +85°C operating temperature range
QFN-56 package (7mm × 7mm, 0.4mm pitch)