Maxim Integrated MAXREFDES72 参考设计
MaximMAXREFDES72 参考设计是一款用于 Arduino 平台的 Pmod™ 适配器，可解决创建平台原型中的标准兼容性问题。MAXREFDES72 由 MAX14661 Beyond-the-Rails™ 16:2 多路复用器、两个 MAX14611 电平转换器、以及 DS3231M 实时时钟组成。通过 I2C 总线写入 MAX14661 多路复用器，可对电路板进行配置。八路 Arduino 数字 GPIO 通过电平转换器连接 Pmod 连接器，而且这 8 路信号每条都连接多路复用器。选择这 8 路数字信号的目的，是为 Pmod Type 2 连接 Arduino Uno R3 SPI 信号，并避免 I2C 和 UART 信号出现在 Arduino 排针处。对于 Type 1 (GPIO) 和 Type 2 (SPI)则无需配置。要实现 Type 3、Type 4、I2C、或其他需访问 I2C、UART、或 PWM 等其他实时功能的自定义引脚映射，请配置多路复用器，将信号传导至相关引脚。
Eight Arduino digital GPIO are connected to the Pmod connector through level shifters and each of these 8 signals are also connected to the multiplexer. The 8 digital signals were chosen so that the Arduino Uno R3 SPI signals are connected for the Pmod Type 2 and to avoid the I2C and UART signals at the Arduino headers. For Type 1 (GPIO) and Type 2 (SPI), no configuration is necessary. To implement Type 3, Type 4, I2C, or other custom pin mappings that need access to I2C, UART, or other real time functions such as PWM, configure the multiplexer to route the signals to the appropriate pins.
特性
- Arduino® UNO R3 compatible
- IOREF support for 3.3V or 5V signal levels
- 2x6 Digilent® Pmod™ compatible interface
- Supports Pmod types 1, 2, 3, and 4, I2C and nonstandard pinouts
- Level shifting between Pmod and Arduino pins
- Precision RTC with integrated MEMS resonator
应用
- Prototyping
- Science fair projects
- Maker and hobbyist projects
- Science and electronics education
- Analog peripheral testing and integration
