RX8025T-Epson high-precision temperature fill RTC real-time clock module

RX8025T Is a new type of real-time clock module with I2C interface and temperature compensation function. The internal integrated 32.768KHz temperature compensation crystal oscillator can be used in a variety of occasions requiring high precision clock. By setting the control bit, the temperature compensation function at different intervals can be realized, which greatly improves the accuracy of the clock. The chip can be set for four different periods for temperature compensation, the default setting is 2S compensation. The chip is produced by C-MOS process, with very low functional consumption and can be used for battery power.

1. Product characteristics

1. Built-in 32.768KHz DTCXO with high stability (digital temperature compensation crystal oscillator)

2. Support the high-speed mode of I2C bus (400K).

3. Timed alarm function (can be set: day, date, hour, minute)

4. Fixed-cycle timing interruption function.

5. Time update and interrupt function.

6. 32.768KHz Frequency output (with enabling OE function)

7. Leap year automatic adjustment function.(2000 to 2099)

8. Wide range interface voltage: 2.2V to 5.5V

9. Time holding voltage for a wide range: 1.8V to 5.5V

10. Low current power consumption: 0.8 uA / 3V (Typ.)

11. Operating temperature: -45℃ ~85℃

2. operator schema

1. Real-time clock mode:

This feature is used to set and read year, month, day, week, hours, minutes, seconds time information. For the last two numbers, any year that can be divisible by 4 is treated as a leap year.(2000 to 2099)

2. Interruption occurrence function of the fixed cycle:

The fixed cycle timing interrupt occurrence function can produce a fixed cycle interrupt event that can be set at any time between 244.14uS to 4095 and minutes.

3. Timed update and interruption function:

This function can generate an interrupt event per second or per minute, depending on the timing of the internal clock. When an interrupt event is generated, the value of the UF flag bit becomes 1 and the simultaneous / INT pin becomes a low level indicating the generation of an interrupt event.

4. Alarm clock interruption function:

This function can generate an outage according to the alarm setting.

5, 32.768K Hz Clock Output:

A clock signal of the 32.768kHz frequency can be output through the FOUT pin, which can be controlled by the FOE pin.

6. Interface function of the CPU:

The reading and writing of the data is all done through the I2C bus interface.

3. applied range

● Electricity meter, water meter, gas meter

● level switch

● Sensitive transceiver applications for EMI

● industrial computer

● Access control and security system

4. distribution network

The 8025T module simultaneously solves two major technical challenges in the industry of built-in crystal oscillator real-time clock chips, and is widely used in the smart meter industry. Has gained the favor of manufacturers of electricity, water, and gas meters.