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[PXCT-1576] - Nano R4 UART Documentation on Docs (Update) #2742

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[PXCT-1576] - Nano R4 UART Documentation on Docs (Update) #2742

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26 changes: 13 additions & 13 deletions content/hardware/03.nano/boards/nano-r4/datasheet/datasheet.md
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Expand Up @@ -43,19 +43,19 @@ The Nano R4 is an evolution of its predecessor, the Nano Classic, which was prev
The board features the standard 14x digital I/O ports, 8x analog channels, dedicated pins for I2C, SPI and UART
connections. Compared to its predecessors the board has a much larger memory: 8x times more flash memory (256 kB) and 16x times more SRAM (32 kB).

| Feature | Description |
| --------------------- | ---------------------------------------------------------------------------------------------------------------- |
| Microcontroller | R7FA4M1AB3CFM 32-bit Arm® Cortex®-M4 |
| Frequency | 48 MHz |
| Internal Memory | 256 kB Flash / 32 kB RAM / 8 kB EEPROM |
| USB Connectivity | USB-C® port for power and data |
| Power | Input voltage (VIN): 6-21 V / Power via USB-C® at 5 V |
| Digital Inputs | GPIO (21x - All exposed I/O can be used as digital), PWM (6x) |
| Analog Inputs | 14-bit ADC (8x) |
| Real-time Clock (RTC) | Yes (external crystal oscillator included) |
| Communication | UART (1x), I2C (2x) (5 V over breakout and 3.3 V over Qwiic), SPI (1x), CAN (external transceiver required) (1x) |
| Dimensions | 18 mm x 45 mm |
| Operating Temperature | -40 °C to +85 °C |
| **Feature** | **Description** |
|-----------------------|-----------------------------------------------------------------------------------------------------------------------------------------------|
| Microcontroller | R7FA4M1AB3CFM 32-bit Arm® Cortex®-M4 |
| Frequency | 48 MHz |
| Internal Memory | 256 kB Flash/32 kB RAM/8 kB EEPROM |
| USB Connectivity | USB-C® port for power and data |
| Power | Input voltage (VIN): 6-21 V / Power via USB-C® at 5 V |
| Digital Inputs | GPIO (21x - All exposed I/O can be used as digital), PWM (6x) |
| Analog Inputs | 14-bit ADC (8x) |
| Real-time Clock (RTC) | Yes (external crystal oscillator included) |
| Communication | UART (2x: Serial: USB, Serial1: D0/D1), I2C (2x) (5 V over breakout and 3.3 V over Qwiic), SPI (1x), CAN (external transceiver required) (1x) |
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@TaddyHC TaddyHC Dec 2, 2025

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Suggested change
| Communication | UART (2x: Serial: USB, Serial1: D0/D1), I2C (2x) (5 V over breakout and 3.3 V over Qwiic), SPI (1x), CAN (external transceiver required) (1x) |
| Communication | Serial interfaces (2x: Serial over USB, Serial1 on D0/D1), I2C (2x) (5 V over breakout and 3.3 V over Qwiic), SPI (1x), CAN (external transceiver required) (1x) |

To give them idea of being serial interfaces

| Dimensions | 18 mm x 45 mm |
| Operating Temperature | -40 °C to +85 °C |

### Microcontroller

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58 changes: 29 additions & 29 deletions content/hardware/03.nano/boards/nano-r4/tech-specs.yml
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@@ -1,30 +1,30 @@
Board:
Name: Arduino® Nano R4
SKU: ABX00142 (Castellated Pins) / ABX00143 (With Headers)
Microcontroller: Renesas RA4M1 (Arm® Cortex®-M4)
USB:
USB-C®: Programming Port
Pins:
Digital I/O Pins: 21 (all the exposed I/O can be used as digital I/O pins)
Analog input pins: 8
DAC: 1 (A0)
OPAMP: A1, A2, A3
VBAT: J5
PWM pins: 6
External interrupts: 2,3
Communication:
UART: 1
I2C: "2 (5 V: A4, A5 / 3.3 V: QWIIC, J3, J4)"
SPI: 1
CAN: 1
Power:
Circuit operating voltage: +5 VDC
Input voltage (VIN): +6-21 VDC
DC Current per I/O Pin: 8 mA
Clock speed:
Main core: 48 MHz
Memory:
RA4M1: 256 kB Flash, 32 kB RAM, 8 kB EEPROM
Dimensions:
Width: 18 mm
Board:
Name: Arduino® Nano R4
SKU: ABX00142 (Castellated Pins) / ABX00143 (With Headers)
Microcontroller: Renesas RA4M1 (Arm® Cortex®-M4)
USB:
USB-C®: Programming Port
Pins:
Digital I/O Pins: 21 (all the exposed I/O can be used as digital I/O pins)
Analog input pins: 8
DAC: 1 (A0)
OPAMP: A1, A2, A3
VBAT: J5
PWM pins: 6
External interrupts: 2,3
Communication:
UART: "2 (Serial: USB, Serial1: D0/D1)"
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@TaddyHC TaddyHC Dec 2, 2025

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Suggested change
UART: "2 (Serial: USB, Serial1: D0/D1)"
Serial interfaces: "2 (Serial over USB, Serial1 on D0/D1)"

To give them idea of being serial interfaces

I2C: "2 (5 V: A4, A5 / 3.3 V: QWIIC, J3, J4)"
SPI: 1
CAN: 1
Power:
Circuit operating voltage: +5 VDC
Input voltage (VIN): +6-21 VDC
DC Current per I/O Pin: 8 mA
Clock speed:
Main core: 48 MHz
Memory:
RA4M1: 256 kB Flash, 32 kB RAM, 8 kB EEPROM
Dimensions:
Width: 18 mm
Length: 45 mm
Binary file modified ...rdware/03.nano/boards/nano-r4/tutorials/01.user-manual/assets/simple-pinout.png
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