RX26T Motor Control Board

Overview

MCB-RX26T Type B is a CPU board for motor control evaluation. By using this product in combination with an inverter board, motor control using RX26T can be easily performed.

MCU Native Pin Access

The MCB-RX26T Type B includes:

CPU maximum operating frequency 120MHz, 32-bit RXv3 Core
Package/Pin count: LFQFP/100 pin
ROM/RAM: 512KB/64KB
MCU input clock: 10MHz (Generate with external crystal oscillator)

System Control and Debugging

Power supply: DC 5V,3.3V (selectable with jumper switch) Select one way automatically from the below
- USB-powered (debug port)
- External power supply via standard input
Debugging support:
- Via E2lite debugger with E2OB (Onboard debugger circuit) - open Jumper J11
- Via JLink with JTAG connector - short Jumper J11
Connector:
- Inverter board connector
- USB connector for E2 OB
- SCI connector for Renesas Motor Workbench communication
- Through hole for CAN communication
- Through hole for SPI communication
- PMOD connectors
User LEDs and buttons:
- Four User LEDs
- Power LED indicating availability of regulated power
- One Reset button

Hardware

Detailed hardware features can be found at:

RX26T MCU: RX26T Group User’s Manual Hardware
MCB-RX26T Type B: MCB-RX26T Type B - User’s Manual

Note: The CPU used in the RX26T is based on the RXv3 core. However, the current version of the Zephyr kernel only supports the RXv1 core. Since the RXv3 core is backward-compatible with RXv1, it works with this version. But the following limitations apply:

FPU context saving is not supported. Do not use the FPU.
Register bank save function is not supported. Do not use instructions for register bank save function.
Accumulator register saving is not supported. Do not use DSP instructions or any libraries that include DSP instructions.

Supported Features

The mcb_rx26t 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.

`mcb_rx26t@typeb/r5f526tfddfp` target

Type	Location	Description	Compatible
CPU	on-chip	Renesas RXv3 CPU1	`renesas,rxv3`
Clock control	on-chip	Renesas RX Root Clock Generation Circuit4 1	`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 Clock7 5	`renesas,rx-cgc-pclk`
Flash controller	on-chip	Renesas RX Flash controller1	`renesas,rx-flash`
GPIO & Headers	on-chip	Renesas RX series GPIO2 13	`renesas,rx-gpio`
I2C	on-chip	Renesas RX I2C Master controller1	`renesas,rx-i2c`
Interrupt controller	on-chip	Renesas ICU Interrupt controller1	`renesas,rx-icu`
Interrupt controller	on-chip	Renesas group interrupt2 4	`renesas,rx-grp-intc`
LED	on-board	Group of GPIO-controlled LEDs1	`gpio-leds`
Miscellaneous	on-chip	Renesas RX Data Transfer Controller (DTC)1	`renesas,rx-dtc`
Miscellaneous	on-chip	Renesas RX SCI controller1 3	`renesas,rx-sci`
MTD	on-chip	Flash memory binding of Renesas RX family2	`renesas,rx-nv-flash`
Pin control	on-chip	Renesas RX Pin Controller1	`renesas,rx-pinctrl`
Pin control	on-chip	Rensas RX Pinmux (Multi Function Pin Controller, MPC)15	`renesas,rx-pinmux`
Renesas RX	on-chip	Renesas RX SWINT (Software Interrupt)1	`renesas,rx-swint`
Serial controller	on-chip	Renesas RX SCI UART controller1 3	`renesas,rx-uart-sci`
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 node2	`renesas,rx-timer-cmt`

Programming and Debugging

The mcb_rx26t board supports the runners and associated west commands listed below.

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

Applications for the mcb_rx26t board can be built, flashed, and debugged using standard Zephyr workflows. Refer to Building an Application and Run an Application for more details.

Flashing

Program can be flashed to MCB-RX26T via e2lite E2OB (Onboard debugger circuit).

To flash the program to board

Connect from board’s debug connector port to host PC using USB connector for E2 OB.

Execute west command
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": "Renesas GDB Hardware Debugging",
          "target": {
              "deviceFamily": "RX",
              "device": "R5F526TF",
              "debuggerType": "E2LITE",
              "serverParameters": [
                  "-uUseFine=", "1",
                  "-w=", "1",
              ],
          }
      }
  ]
}