RX74N Evaluation Kit

Overview

The EK-RX74N is an Evaluation Kit for the Renesas RX74N MCU Group, part of the RX700 Series. It enables users to seamlessly evaluate the features of the RX74N MCU group and develop embedded systems applications.

The MCU in this series is based on the RXv3e CPU core running up to 600 MHz with the following features:

1 MB Code MRAM
1.5 MB RAM
Built-in encryption module
CAN FD (Controller Area Network with Flexible Data Rate)
Gigabit Ethernet Module (ETHM), RGMII interface
USB High Speed and USB Full Speed, host and function
eXpanded SPI (XSPI) interface for external OctaFlash and OctalRAM

MCU Native Pin Access

600 MHz RX74N MCU (R5K574NCB4AE) in 320-pin, LFBGA package
Native pin access through 30 x 2-pin x 2-piece and 20 x 2-pin breakout pin headers
MCU and USB module current measurement points for current consumption measurement
24.000 MHz crystal oscillator as main clock
32.768 kHz crystal oscillator as sub clock
512 Mbit External OctaFlash and 256 Mbit External OctalRAM (present in the MCU Native Pin Access area of the EK-RX74N board)

System Control and Ecosystem Access

Five 5 V input sources
- USB (Debug, High Speed, Full Speed, Serial)
- External power supply (using surface mount clamp test points and power input vias)
Two Debug modes
- Debug on-board (E2 emulator On Board, FINE interface)
- Debug in (JTAG, SWD, FINE interface)
User LEDs and switches
- Three User LEDs (red, blue, green)
- Power LED (white) indicating availability of regulated power
- Debug LED (yellow) indicating the debug connection
- Two User switches
- One Reset switch
Five popular ecosystems expansions
- Two Seeed Grove system (I2C/Analog) connectors (not populated)
- One SparkFun Qwiic connector (not populated)
- Two Digilent Pmod (UART/SPI/I2C) connectors
- Arduino (Uno R3) connector
- MikroElektronika mikroBUS connector
USB serial converter interface
USB Full Speed host and function (present in the Special Feature Access area of the EK-RX74N board)

Special Feature Access

CAN FD transceiver and interface connector
Ethernet connector (RGMII interface)
USB High Speed host and function

Hardware

Detailed hardware features can be found at:

RX74N MCU: RX74N Group User’s Manual Hardware
EK-RX74N board: EK-RX74N - User’s Manual

Supported Features

The ek_rx74n board supports the hardware features listed below.

on-chip / on-board: Feature integrated in the SoC / present on the board.
2 / 2: Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo: Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

`ek_rx74n/r5k574ncb4ae` target

On-target memory for this board target: 1536 KiB of RAM, 1 MiB of Flash.

Type	Location	Description	Compatible
CPU	on-chip	Renesas RX CPU1	`renesas,rxv3e`
Clock control	on-chip	Renesas RX Root Clock Generation Circuit1	`renesas,rx-cgc-root-clock`
	on-chip	Generic fixed-rate clock provider3	`fixed-clock`
	on-chip	Renesas RA Sub-Clock1	`renesas,ra-cgc-subclk`
	on-chip	Renesas RX Clock Generation Circuit PLLCCR2 6	`renesas,rx-cgc-pllccr-type`
	on-chip	Renesas RX clock control node pclk block1	`renesas,rx-cgc-pclk-block`
	on-chip	Renesas RX Clock Control Peripheral Clock11 13	`renesas,rx-cgc-pclk`
GPIO & Headers	on-chip	Renesas RX GPIO IO port3 14	`renesas,rx-gpio-ioport`
Interrupt controller	on-chip	Renesas ICUM Interrupt controller1	`renesas,rx-icum`
LED	on-board	Group of GPIO-controlled LEDs1	`gpio-leds`
Miscellaneous	on-chip	Renesas RX SCI B controller1 12	`renesas,rx-sci-b`
MTD	on-chip	Flash node1	`soc-nv-flash`
Pin control	on-chip	Renesas RX Pin Controller1	`renesas,rx-pinctrl-pfs`
Reserved memory	on-chip	Renesas Option-Setting Memory2	`renesas,ofs-memory`
Renesas RX	on-chip	Renesas RX SWINT (Software Interrupt)1	`renesas,rx-swint`
Serial controller	on-chip	Renesas RX SCI_B UART controller1 12	`renesas,rx-uart-sci-b`
SRAM	on-chip	Generic on-chip SRAM1	`mmio-sram`
Timer	on-chip	Renesas RX timer node1	`renesas,rx-timer-cmt-start-control`
Timer	on-chip	Renesas RX timer node1 1	`renesas,rx-timer-cmt`

Programming and Debugging

The ek_rx74n board supports the runners and associated west commands listed below.

	flash	debug
rfp	✅ (default)

Applications for the ek_rx74n board configuration can be built, flashed, and debugged in the usual way. See Building an Application and Run an Application for more details on building and running.

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b ek_rx74n samples/hello_world
west flash

Open a serial terminal, reset the board, and you should see the following message in the terminal:

***** Booting Zephyr OS v4.4.0-xxx-xxxxxxxxxxxxx *****
Hello World! ek_rx74n

Flashing

Program can be flashed to EK-RX74N via the on-board E2 emulator On Board (E2OB) circuit using Renesas Flash Programmer (RFP) command line interface (rfp-cli). Renesas Flash Programmer is available at https://www.renesas.com/en/software-tool/renesas-flash-programmer-programming-gui

To flash the program to board

Connect the USB DEBUG1 connector to a host PC. Set the DIP SW (SW6) to Debug on-board mode as described in EK-RX74N - User’s Manual
Execute west command
```
west flash -r rfp
```