Arduino 開發板
Arduino Mega 2560 R3
Arduino Mega 2560 R3
Arduino Mega 2560 R3是意大利Arduino設計的旗艦式微型電路板，由ATmega16U2芯片作為核心，擁有54路數字輸入/輸出，16路模擬輸入，4路UART接口，16MHz晶體振盪器，USB Type B界面，一個電源插座，ICSP header和重設按鈕。
規格
- 供電電壓
- 5 V
- 邏輯電平
- 5 V
- 介面
- i2c, spi, uart, pwm, analog, usb
- 尺寸
- 102 × 53.6 × 15.3 mm
針腳
| 名稱 | 類型 | 說明 |
|---|---|---|
| SCL | bidirectional | I2C clock; maps to D21 |
| SDA | bidirectional | I2C data; maps to D20 |
| AREF | input | Analog reference voltage input |
| GND | ground | |
| D0 | bidirectional | Serial RX0 |
| D1 | bidirectional | Serial TX0 |
| D2 | bidirectional | PWM, external interrupt |
| D3 | bidirectional | PWM; external interrupt |
| D4 | bidirectional | PWM |
| D5 | bidirectional | PWM |
| D6 | bidirectional | PWM |
| D7 | bidirectional | PWM |
| D8 | bidirectional | PWM |
| D9 | bidirectional | PWM |
| D10 | bidirectional | PWM |
| D11 | bidirectional | PWM |
| D12 | bidirectional | PWM |
| D13 | bidirectional | PWM, built-in LED |
| D14 | bidirectional | Serial TX3 |
| D15 | bidirectional | Serial RX3 |
| D16 | bidirectional | Serial TX2 |
| D17 | bidirectional | Serial RX2 |
| D18 | bidirectional | Serial TX1 |
| D19 | bidirectional | Serial RX1; external interrupt |
| D20 | bidirectional | I2C SDA; external interrupt |
| D21 | bidirectional | I2C SCL; external interrupt |
| D22 | bidirectional | |
| D23 | bidirectional | |
| D24 | bidirectional | |
| D25 | bidirectional | |
| D26 | bidirectional | |
| D27 | bidirectional | |
| D28 | bidirectional | |
| D29 | bidirectional | |
| D30 | bidirectional | |
| D31 | bidirectional | |
| D32 | bidirectional | |
| D33 | bidirectional | |
| D34 | bidirectional | |
| D35 | bidirectional | |
| D36 | bidirectional | |
| D37 | bidirectional | |
| D38 | bidirectional | |
| D39 | bidirectional | |
| D40 | bidirectional | |
| D41 | bidirectional | |
| D42 | bidirectional | |
| D43 | bidirectional | |
| D44 | bidirectional | PWM |
| D45 | bidirectional | PWM |
| D46 | bidirectional | PWM |
| D47 | bidirectional | |
| D48 | bidirectional | |
| D49 | bidirectional | |
| D50 | bidirectional | SPI MISO |
| D51 | bidirectional | SPI MOSI |
| D52 | bidirectional | SPI SCK |
| D53 | bidirectional | SPI SS |
| A0 | analog | Maps to digital pin 54 |
| A1 | analog | Maps to digital pin 55 |
| A2 | analog | Maps to digital pin 56 |
| A3 | analog | Maps to digital pin 57 |
| A4 | analog | Maps to digital pin 58 |
| A5 | analog | Maps to digital pin 59 |
| A6 | analog | Maps to digital pin 60 |
| A7 | analog | Maps to digital pin 61 |
| A8 | analog | Maps to digital pin 62 |
| A9 | analog | Maps to digital pin 63 |
| A10 | analog | Maps to digital pin 64 |
| A11 | analog | Maps to digital pin 65 |
| A12 | analog | Maps to digital pin 66 |
| A13 | analog | Maps to digital pin 67 |
| A14 | analog | Maps to digital pin 68 |
| A15 | analog | Maps to digital pin 69 |
| RESET | input | Active-low reset |
| +3V3 | power | |
| +5V | power | |
| VIN | power | |
| IOREF | output | I/O reference voltage |
| NC | nc |
程式庫
其他規格
- 輸入電壓
- 6-20V (建議在7-12V內)
- 連接
- USB Type B
使用注意
- 呢塊板嘅 I2C 針腳喺 D20/D21（唔係 Uno 嘅 A4/A5），SPI 針腳喺 D50–D53（唔係 Uno 嘅 D11–D13），用擴展板或者外設時要特別留意。ATmega16U2 係 USB-to-Serial 轉換晶片，唔係主控。供電方面，VIN 同 DC jack 可以食 6–20V，但建議 7–12V，太高壓會令板上穩壓器過熱。USB Type B 插座較大，唔好同 micro-USB 混淆。