Description
Unit RTC is a programmable real-time clock module based on the HYM8563 low-power CMOS real-time clock/calendar chip. It uses the I2C communication interface and is designed to provide reliable timekeeping for embedded devices, instruments, clocks, alarms, and power-off time synchronization applications.
The module supports reading and writing seconds, minutes, hours, day of the week, day, month, and year. It integrates a 32.768kHz high-precision clock crystal oscillator to reduce time error, and its fully enclosed shell helps protect the circuit for more stable operation.
Features
- HYM8563 RTC chip: integrates the HYM8563 low-power CMOS real-time clock/calendar chip.
- I2C communication: uses I2C communication at address 0x51.
- Time and date access: supports reading and writing seconds, minutes, hours, day of the week, day, month, and year.
- 32.768kHz crystal: high-precision clock crystal oscillator helps reduce time error.
- Low power consumption: powered by a button battery for long-term timekeeping.
- Century flag: includes century flag support.
- Protected enclosure: fully enclosed shell helps protect the circuit and improve operation stability.
Specifications
| Product | Unit RTC |
| SKU | U126 |
| Clock Chip | HYM8563 |
| Crystal Frequency | 32.768kHz |
| Communication Interface | I2C @ 0x51, maximum bus speed 400Kbps |
| Power Supply | DC 5V |
| Product Size | 48.0 x 24.0 x 8.0mm |
| Product Weight | 7.4g |
| Package Size | 138.0 x 93.0 x 9.0mm |
| Gross Weight | 12.8g |
Protocol
| Protocol Type | I2C |
| I2C Address | 0x51 |
| Maximum Bus Speed | 400Kbps |
| Readable / Writable Data | Seconds, minutes, hours, day of the week, day, month, and year |
| Clock Reference | 32.768kHz crystal oscillator |
Applications
- Clocks and alarms.
- Power-off time synchronization.
- Embedded device system clock.
- Instrument timekeeping.
Product List
| 1 | Unit RTC |
| 1 | HY2.0-4P Grove Cable (20cm) |
Other Content
- Timekeeping function: Unit RTC can keep date and time information for embedded systems.
- Power-off synchronization: the low-power RTC design helps maintain time information when the main system is powered off.
- Stable operation: the enclosed shell helps protect the circuit during use.
Resources
FAQ
| What is Unit RTC used for? | It is used as a real-time clock module for clocks, alarms, power-off time synchronization, embedded devices, and instruments. |
| Which RTC chip does it use? | It uses the HYM8563 low-power CMOS real-time clock/calendar chip. |
| Which communication interface does it use? | It uses I2C communication at address 0x51. |
| What is the maximum I2C bus speed? | The official specification lists a maximum bus speed of 400Kbps. |
| What time and date fields can be accessed? | It supports reading and writing seconds, minutes, hours, day of the week, day, month, and year. |
| What crystal frequency does it use? | It uses a 32.768kHz high-precision clock crystal oscillator. |
| What is included in the package? | The package includes 1 Unit RTC and 1 HY2.0-4P Grove Cable (20cm). |