Feature
- Based on PCF8563 clock chip with century mark, second, minute, hour, day, week, month, year;
- Use the I2C interface to communicate with the Core/Core+ module;
- Use EEPROM AT24C32 with I2C interface;
- Low-power clock chip, the typical current value 0.25μA. With a super capacitor, the clock still keeps running after a power diconnection;
- Open hardware circuit design and Arduino compatible programming development environment;
- Uniform Microduino interface standard and rich peripheral modules, capable of having a fast and flexible connection and extension with other modules and sensors in accord with Microduino interface standard;
- Easy to be integrated to pegboards with a 2.45-pitch female header connector interface.
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Specification
- Clock chip: PCF8563;
- Low-power CMOS real-time clock/calendar chip；
- Provide a programmable clock output, an interrupt output and a brown-out detector. All the addresses and data will have a serial transmission through the I2C bus interface;
- With the maximum bus speed of 400Kbits/s, the embedded word address register will generate increment automatically after reading and writing data every time.
- EEPROM chip：AT24C32
- Provide 32,768 EPROM serial power, which can be organized with a length of 4096 words × 8-bit;
- Cascade feature allows AT24C32 to articulate eight devices on the same I2C bug, to have the replication cycle of millions lives and saved the data to 100 years with a write-protect function.
- Super capacitor：XH414
- Provide a power-down timing function in a time slot.
Document
Eagle PCB Download
Main components
Development
Arduino library and support package
Application
Software Download
- Prepared hardware：Microduino FT232R, Microduino Core, Microduino RTC andMicroduino OLED；
- Prepared software：Microduino provides test program（Arduino terminal）, Arduino IDE（version 1.0 and higher）and Rtc_Pcf8563 library；
- Put the downloaded library to the library subfolder of Arduino IDE installation folder；
- Start Arduino IED，open the Microduino test program, choose the "Microduino Core (Atmega328P@16M,5V)" , then download directly.
Test the continued time after power down：[RTC_Time]
- The loading process is displayed after power on, including：Welcome！Load Time and "Microduino". It takes about one second to load a project. After the loading, it will enter into the main program page.
- Date is displayed on the first line. The format is xx/xx/xx(year/month/day);
- Time including week is displayed on the second line. The time format: xx:xx:xx(Hour:minute:second), followed the week(English format,excluding abbreviations)；
- The third line fixedly shows："Microduino-RTC v1.0 201310". Please choose small font due to lots of characters；
- After program running, just disconnect the power and wait for a while. You can see the Time on the second line that is the continued time instead of the default time;
- (Note: Microduino-RTC is a programmable clock output module，using function vosettime() to set time. By setting time through vosettime() function, you need to comment out vosettime() so that you can take blackout timing next time. Otherwise, you have to reset the value after power-on and restart.)
Test EEPROM read/write：[RTC_EEPROM]
- The loading process is displayed as soon as the system powers on, including Welcome!, Load EEPROM and "Microduino". In every minute, will the system load a project. It will enter the main program page after the download;
- The first line displays the random function values，the first value is a random number from 10 to 99, the second value is the read value power recovered after last power down；
- The second line fixed displays that："Microduino-RTC v1.0 201310". Please choose small font due to lots of characters；
- You can shut off the power supply and then restart during the test. And you'll see that the last value before the blackout has updated to the place where the EEPROM displays values.
Test regular interruption：[RTC_Alarm]
- The loading process is displayed as soon as the system powers on, including Welcome!, Load EEPROM and "Microduino". In every minute, will the system load a project. It will enter the main program page after the download;
- The first line shows the time. Time format: xx:xx:xx(Hour:minute:second);
- The second line shows："Microduino-RTC v1.0 201310". Please choose small font due to lots of characters；
- When it reaches the set time, the LED light flashes one time per second and lasts for one minute. You can see the countdown time on the OLED screen
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