[arduino][doc] 研究下ARDUINO接口的设计语言

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NANO: 20PIN 1PIN => LED 小灯 2PIN => 3.3vcc 3PIN => AREF ADC参考电压 4PIN => 模拟A0 5PIN => 模拟A1 6PIN => 模拟A2 7PIN => 模拟A3 8PIN => 模拟A4 =>IIC SDA 9PIN => 模拟A5 =>IIC SDL

12 PIN => 5V 13 PIN => RESET 14 PIN => GND 15 PIN => VIN ???? //=================== 16PIN => UART TX 数字D0 17PIN => UART RX 数字D1 18PIN => RESET 19PIN => GND

20PIN => 数字D2 21PIN => 数字D3 22PIN => 数字D4 23PIN => 数字D5 24PIN => 数字D6 25PIN => 数字D7 26PIN => 数字D8 27PIN => 数字D9 28PIN => 数字D10 29PIN => 数字D11 SPI MOSI 30PIN => 数字D12 SPI MISO

核心板： 1个LED小灯 1个SWD接口

向下兼容拓展

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https://wenku.baidu.com/view/3d2e12fb83d049649b6658bb.html

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https://store.arduino.cc/usa/arduino-nano

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https://store.arduino.cc/usa/arduino-micro

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https://store.arduino.cc/usa/nano-33-ble

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1. 左边都是模拟的ADC信号引脚A0-A5
2. 上面是IOREF RESET 3.3V 5.5V (输出） GND GND VIN (输入）

右边：IIC 两根SCL SDA AREF 参考电压 GND D13-D0 D1 TX D0 RX

SPI: D13 SCL D12 MISO D11 MOSI D10 SS

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LED 灯一般会有3个LED BLINK, LED TX LED RX + POWER LED

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STM32 L496 NUCLEO 这个和arduino是相兼容的

一部分是arduino接口。 其余部分成为Zio extension接口

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mkiro bus

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引脚图查看器 https://pico.pinout.xyz

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fritzing 画图工具

https://fritzing.org/download/

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https://www.cnblogs.com/Bruce_H21/p/11555605.html