Merge pull request #2597 from arduino/mcmchris/nano-r4/datasheet-pinout

Nano R4, WiFi and Minima Datasheet pinout table update

Author: mcmchris

content/hardware/02.hero/boards/uno-r4-minima/datasheet/datasheet.md

@@ -181,7 +181,7 @@ In case you need to power external devices that require more power, e.g. servo m
 
 | Pin | Function | Type   | Description                                      |
 | --- | -------- | ------ | ------------------------------------------------ |
-| 1   | BOOT     | MD     | Mode selection                                   |
+| 1   | BOOT     | Mode   | Mode selection                                   |
 | 2   | IOREF    | IOREF  | Reference for digital logic V - connected to 5 V |
 | 3   | Reset    | Reset  | Reset                                            |
 | 4   | +3V3     | Power  | +3V3 Power Rail                                  |

content/hardware/02.hero/boards/uno-r4-wifi/datasheet/datasheet.md

@@ -292,7 +292,7 @@ For powering e.g. servo motors, always use an external power supply.
 
 | Pin | Function | Type   | Description                                      |
 | --- | -------- | ------ | ------------------------------------------------ |
-| 1   | BOOT     | NC     | Not Connected                                    |
+| 1   | BOOT     | Mode   | Mode selection                                   |
 | 2   | IOREF    | IOREF  | Reference for digital logic V - connected to 5 V |
 | 3   | Reset    | Reset  | Reset                                            |
 | 4   | +3V3     | Power  | +3V3 Power Rail                                  |

content/hardware/03.nano/boards/nano-r4/datasheet/assets/ABX00142-pinout.png

@@ -221,7 +221,7 @@ The Nano breakout connectors pinout is shown in the following figure.
 | --- | --------- | --------- | --------------------------------------- |
 | 1   | D13 / SCK | Digital   | Serial Clock                            |
 | 2   | +3V3      | Power Out | +3V3 Power Rail                         |
-| 3   | B0 / AREF | Analog    | Analog Reference                        |
+| 3   | AREF      | Analog    | Analog Voltage Reference                |
 | 4   | A0        | Analog    | Analog input 0 / DAC                    |
 | 5   | A1        | Analog    | Analog input 1 / OPAMP +                |
 | 6   | A2        | Analog    | Analog input 2 / OPAMP -                |
@@ -231,7 +231,7 @@ The Nano breakout connectors pinout is shown in the following figure.
 | 10  | A6        | Analog    | Analog input 6                          |
 | 11  | A7        | Analog    | Analog input 7                          |
 | 12  | 5V        | Power     | USB power (5 V)                         |
-| 13  | BOOT1     | Mode      | Board Reset 1                           |
+| 13  | BOOT      | Mode      | Mode selection                          |
 | 14  | GND       | Power     | Ground                                  |
 | 15  | VIN       | Power     | Voltage Input                           |