M5Stack Real Time Clock (RTC) Unit
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M5Stack Real Time Clock (RTC) Unit
The RTC (Real-Time Clock) unit is a handy little programmable module that incorporates the HYM8563 low-power CMOS real-time clock/calendar chip. It uses the I2C communication interface to exchange data and control things.
The module is designed with a full-coverage case, which is great for keeping all the circuitry safe and sound and making sure it works perfectly for as long as possible. This protective casing is there to keep the RTC unit safe from any external factors that might cause trouble, such as dust, moisture, and physical damage. This helps to make sure that it will be reliable for a long time to come! Thanks to the I2C communication interface, the RTC unit can be easily added to existing systems, which makes it easy to communicate and synchronise with other devices or modules.
The RTC unit is a great fit for all kinds of embedded systems, instruments, and devices where an accurate and reliable real-time clock is needed. It's great for use as a reference for time-based operations, scheduling, data logging, event triggering, and other time-sensitive functions!
Role of RTC
Most MCUs are built-in timers, which usually start working automatically when the hardware is powered on, and reset when the hardware is powered off. The built-in timer can handle some simple timing tasks, but if we want to implement data timestamp recording, clock, alarm clock, and other time-span functions, a system power-independent clock RTC is the best choice.
Features
- Support second/minute/hour/day/month/year. time data reading and writing
- 32.768kHz high-precision clock crystal, greatly reducing the time error
- With low power consumption, coin batteries can work continuously for years
- With century mark
- I2C communication interface
Includes
- 1x Unit RTC
- 1x Coin cell battery (38mAh)
- 1x HY2.0-4P cable
Applications
- Clock, alarm clock
- Power down time synchronization
Specifications
| Specifications | Parameters |
|---|---|
| Clock chip | HYM8563 |
| Crystal Frequency | 32.768kHz |
| Communication interface | I2C, addr: 0x51, bus max speed 400Kbps |
| Power supply voltage | 5V DC |
| Net weight | 4.1g |
| Gross Weight | 8.3g |
| Product Dimensions | 48 * 24 * 8mm |
| Package Size | 67 * 53 * 12mm |
Effective Date: March 27, 2025
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