Apply suggestions from code review

Co-authored-by: José Antonio Bagur Nájera <[email protected]>

Author: Hannes7eicher

content/hardware/03.nano/boards/nano-r4/features.md

@@ -1,5 +1,5 @@
 <FeatureDescription>
-The Arduino Nano R4 features the powerful Renesas RA4M1 microcontroller with a 32-bit Arm® Cortex®-M4 core running at 48 MHz. Its classic Nano form factor ensures compatibility with countless accessories, while modern features like USB-C®, CAN bus, and Qwiic I²C connector make it a versatile choice for embedded, automation, and prototyping projects.
+The Arduino Nano R4 features the powerful Renesas RA4M1 microcontroller with a 32-bit Arm® Cortex®-M4 core running at 48 MHz. Its Nano family board form factor ensures compatibility with countless accessories. At the same time, modern features like USB-C®, CAN bus and an onboard Qwiic connector make it a versatile choice for embedded, automation and prototyping projects.
 </FeatureDescription>
 
 <FeatureList>
@@ -16,23 +16,23 @@ The Nano R4 is compatible with the Arduino Cloud platform, allowing you to rapid
 </Feature>
 
 <Feature title="Built-in DAC & OPAMP" image="mcu">
-With a 12-bit DAC on A0 and an integrated operational amplifier, the Nano R4 enables analog signal generation and advanced signal conditioning right out of the box.
+With a 12-bit DAC on the A0 pin and an integrated operational amplifier, the Nano R4 enables analog signal generation and advanced signal conditioning.
 </Feature>
 
 <Feature title="USB-C®" image="usb">
 The first Nano board to feature a USB-C® connector for streamlined power and data transfer.
 </Feature>
 
 <Feature title="CAN Bus Support" image="communication">
-The Nano R4 includes support for CAN communication (with external transceiver), making it suitable for industrial and automotive applications.
+The Nano R4 supports CAN communication (with external transceivers), making it suitable for industrial and automotive applications.
 </Feature>
 
 <Feature title="Real-Time Clock (RTC)" image="clock">
-The built-in RTC and 16 MHz external crystal ensure accurate timekeeping — ideal for data logging and scheduled task applications.
+The built-in RTC and 16 MHz external crystal ensure accurate timekeeping, making it ideal for data logging and scheduled task applications.
 </Feature>
 
 <Feature title="5 V Operating Voltage" image="power">
-Fully 5 V compatible on all GPIOs, making it easy to use with existing Arduino shields and 5 V peripherals without level shifting.
+Fully +5 VDC compatible on all GPIOs, making it easy to use with existing Arduino shields and +5 VDC peripherals without level shifting.
 </Feature>
 
 </FeatureList>

content/hardware/03.nano/boards/nano-r4/product.md

@@ -10,8 +10,8 @@ forumCategorySlug: '/hardware/nano-family/nano-r4/190'
 sku: [ABX00142]
 ---
 
-The **Arduino Nano R4** brings the power of a 32-bit **Arm® Cortex®-M4** processor to the beloved Nano form factor. Based on the **Renesas RA4M1** microcontroller, it features **256 kB Flash**, **32 kB SRAM**, and an **8 kB EEPROM**, all running at **48 MHz** with a built-in **real-time clock**, **14-bit ADC**, and **12-bit DAC**.
+The **Arduino Nano R4** brings the power of a 32-bit **Arm® Cortex®-M4** processor to the beloved Nano family board form factor. Based on the **Renesas RA4M1** microcontroller, it features **256 kB Flash**, **32 kB SRAM** and an **8 kB EEPROM**, all running at **48 MHz** with a built-in **real-time clock** (RTC), **14-bit ADC** and a **12-bit DAC**.
 
-With a **USB-C® connector**, support for **CAN bus**, and both 5 V and 3.3 V I2C connectivity (thanks to the onboard Qwiic connector), the Nano R4 is ideal for modern embedded applications, edge computing, and seamless integration with Arduino’s Modulino ecosystem.
+With a **USB-C® connector**, support for **CAN bus**, and +5 VDC and +3.3 VDC I2C connectivity (thanks to the onboard Qwiic connector), the Nano R4 is ideal for modern embedded applications, edge computing and seamless integration with the Arduino Modulino ecosystem.
 
 Perfect for both beginners and advanced users, the Nano R4 is fully compatible with the **Arduino IDE** and **Arduino Cloud** to accelerate development and deployment.

content/hardware/03.nano/boards/nano-r4/tech-specs.md

@@ -2,16 +2,16 @@ Here you will find the technical specifications for the Arduino® Nano R4.
 
 **Please read: operating voltage**
 
-The microcontroller on the **Arduino Nano R4** operates at 5 V, making it fully compatible with traditional Arduino shields, modules, and accessories designed for 5 V logic levels. This allows seamless reuse of existing components and simplifies interfacing with a wide variety of 5 V sensors and actuators.
+The **Nano R4** microcontroller operates at +5 VDC, making it fully compatible with traditional Arduino shields, modules, and accessories designed for +5 VDC logic levels. This allows seamless reuse of existing components and simplifies interfacing with various +5 VDC sensors and actuators.
 
-Unlike boards based on 3.3 V logic (such as the Nano ESP32), the Nano R4 does not require logic level shifting when connecting to most classic Arduino components.
+Unlike boards based on +3.3 VDC logic (such as the Nano ESP32), the Nano R4 does not require logic level shifting when connecting to most classic Arduino components.
 
 The board supports multiple power input options:
 
-The VIN pin accepts an input voltage range of 6–21 V, regulated down to 5 V internally.
+The VIN pin accepts an input voltage range of +6–21 VDC, which is internally regulated down to +5 VDC.
 
-The board can also be powered directly via the USB-C® port, which supplies 5 V to the system.
+The board can also be powered directly via the board's USB-C® port, which supplies +5 VDC to the system.
 
-All GPIO pins operate at 5 V and can source or sink up to 8 mA of current per pin.
+All GPIO pins operate at +5 VDC and can source or sink up to 8 mA of current per pin.
 
-Always verify the voltage requirements of any connected peripheral, and avoid drawing more current than the board’s limits to prevent instability or damage.
+Always verify the voltage requirements of any connected peripheral to the board and avoid drawing more current than the board’s limits to prevent instability or permanent damage.

content/hardware/03.nano/boards/nano-r4/tech-specs.yml

@@ -5,19 +5,19 @@ Microcontroller: Renesas RA4M1 (Arm® Cortex®-M4)
 USB:
   USB-C®: Programming Port
 Pins:
-  Digital I/O Pins: 21 - All exposed I/O can be used as digital
+  Digital I/O Pins: 21 (all the exposed I/O can be used as digital I/O pins)
   Analog input pins: 8
   DAC: 1
   PWM pins: 6
   External interrupts: 2,3
 Communication:
-  UART: Yes, 1x
-  I2C: Yes, 2x
-  SPI: Yes, 1x
-  CAN: Yes 1 CAN Bus
+  UART: 1
+  I2C: 2
+  SPI: 1
+  CAN: 1
 Power:
-  Circuit operating voltage: 5 V
-  Input voltage (VIN): 6-21 V
+  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