Function: Keeps accurate time and date even when power is off.
Common ICs: DS1307, DS3231, PCF8563
Voltage: 3.3V – 5V (logic), backup battery (e.g., CR2032, 3V)
Interface: I²C (typically SDA & SCL pins)
Features:
Typical Use Cases: Data logging, clocks, scheduling in microcontroller projects (Arduino, ESP32, etc.)
Wiring (DS3231 example):
| RTC Pin | Microcontroller |
|---|---|
| VCC | 5V or 3.3V |
| GND | GND |
| SDA | SDA (A4 on Arduino Uno) |
| SCL | SCL (A5 on Arduino Uno) |
Note: Always connect a backup battery for uninterrupted operation.
您可以尝试使用以下方式获得更精确的搜索结果: