Fast Prototyping Board for RX140

Overview

The Fast Prototyping Board for RX140 MCU Group comes equipped with an RX140 MCU (R5F51406BGFN). The board is inexpensive for RX140 evaluation and prototype development of various applications. It has an emulator circuit so you can write/debug programs just by connecting it to a PC with a USB cable. In addition, it has high expandability with Arduino Uno and two Pmod™ connectors as standard, and through-hole access to all pins of the microcontroller.

MCU Native Pin Access

R5F51406ADFN MCU
- Max 48MHz, 32-bit RXv2 core (RXv2)
- 256 KB Flash, 64 KB RAM
- 80-pin, LFQFP package
Native pin access through 2 x 40-pin male headers (not fitted)
RX MCU current measurement point for precision current consumption measurement
RX MCU on-chip oscillators as main clock
Providing 32.768 kHz crystal oscillator as sub clock

System Control and Ecosystem Access

Two 5 V input sources
- USB
- External power supply (using 2-pin header [not fitted])
On-board debugger / programmer (E2 emulator On Board (referred as E2OB, FINE Interface))
User LEDs and switches
- Two User LEDs (green)
- Power LED (green) indicating availability of regulated power
- Debug LED (yellow) indicating the debug connection
- One User switch
- One Reset switch
Two popular ecosystem expansions
- Two Digilent PmodTM
- Arduino® (Uno R3) connector

Hardware

Detailed hardware features can be found at:

RX140 MCU: RX140 Group User’s Manual Hardware
FPB-RX140: FPB_RX140 - User’s Manual

Supported Features

The fpb_rx140 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.

`fpb_rx140/r5f51406bgfn` target

Type	Location	Description	Compatible
CPU	on-chip	Renesas RXv2 CPU1	`renesas,rxv2`
ADC	on-chip	Renesas RX ADC1	`renesas,rx-adc`
Clock control	on-chip	Renesas RX Root Clock Generation Circuit3 2	`renesas,rx-cgc-root-clock`
	on-chip	Renesas RX Clock Generation Circuit PLL Clock1	`renesas,rx-cgc-pll`
	on-chip	Renesas RX clock control node pclk block1	`renesas,rx-cgc-pclk-block`
	on-chip	Renesas RX Clock Control Peripheral Clock4 7	`renesas,rx-cgc-pclk`
Flash controller	on-chip	Renesas RX Flash controller1	`renesas,rx-flash`
GPIO & Headers	on-chip	Renesas RX series GPIO2 11	`renesas,rx-gpio`
I2C	on-chip	Renesas RX I2C Master controller1	`renesas,rx-i2c`
Input	on-board	Group of GPIO-bound input keys1	`gpio-keys`
Interrupt controller	on-chip	Renesas ICU Interrupt controller1	`renesas,rx-icu`
LED	on-board	Group of GPIO-controlled LEDs1	`gpio-leds`
Miscellaneous	on-chip	Renesas RX Data Transfer Controller (DTC)1	`renesas,rx-dtc`
	on-chip	Renesas RX External Interrupt1 7	`renesas,rx-external-interrupt`
	on-chip	Renesas RX SCI controller1 5	`renesas,rx-sci`
	on-chip	Renesas RX MTU controller5	`renesas,rx-mtu`
MTD	on-chip	Flash memory binding of Renesas RX family2	`renesas,rx-nv-flash`
MTD	on-board	Fixed partitions of a flash (or other non-volatile storage) memory1	`fixed-partitions`
Pin control	on-chip	Renesas RX Pin Controller1	`renesas,rx-pinctrl`
Pin control	on-chip	Rensas RX Pinmux (Multi Function Pin Controller, MPC)13	`renesas,rx-pinmux`
PWM	on-chip	Renesas PWM RX Controller1 4	`renesas,rx-mtu-pwm`
Renesas RX	on-chip	Renesas RX SWINT (Software Interrupt)1	`renesas,rx-swint`
Serial controller	on-chip	Renesas RX SCI UART controller1 5	`renesas,rx-uart-sci`
SPI	on-chip	Renesas RX RSPI1	`renesas,rx-rspi`
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`
Watchdog	on-chip	Renesas RX Independent Watchdog1	`renesas,rx-iwdt`

Programming and Debugging

The fpb_rx140 board supports the runners and associated west commands listed below.

	flash	debug	reset	rtt	attach	debugserver
jlink	✅	✅ (default)	✅	✅	✅	✅
rfp	✅ (default)

Applications for the fpb_rx140 board can be built, flashed, and debugged using standard Zephyr workflows. Refer to Building an Application and Run an Application for more details.

Flashing

The program can be flashed to RSK-RX140 using the E2OB by connecting the board to the host PC and open Jumper J4. Here’s an example for building and flashing the Hello World application.

# From the root of the zephyr repository
west build -b rsk_rx140 samples/hello_world
west flash

Debugging

You can use Renesas Debug extension on Visual Studio Code for a visual debug interface. The configuration for launch.json is as below.

{
  "version": "0.2.0",
  "configurations": [
      {
          "type": "renesas-hardware",
          "request": "launch",
          "name": "RX140 Renesas Debugging E2lite",
          "target": {
              "deviceFamily": "RX",
              "device": "R5F51406",
              "debuggerType": "E2LITE"
              "serverParameters": [
                  "-uUseFine=", "1",
                  "-w=", "0",
              ],
          }
      }
  ]
}