Real-time clock integrated solution with reset delay and main backup power management RX8130C

As the source of accurate clock, the real-time clock acts like a human heart, providing accurate and stable heartbeat for the device. However, due to the variable application scenarios, portable devices have relatively high requirements for internal components, which poses many challenges to the real-time clock module as the core device. The EPSON real clock module product line has a wealth of optional products, which can adapt to different application areas and scenarios. Among them, RX8130CE, as one of the representative products, is widely praised by the industry. The product is a real-time clock module that works in the 1.25-5.5V ultra-wide voltage range, with a minimum static power consumption as low as 300 nA at 3V.

 RX8130CE Integrated IC communication interface, which supports users to flexibly configure the rich internal registers through the interface, so as to better meet different user application scenarios. It includes calendar clock configuration items, wake-up timing configuration items, alarm configuration items, low-voltage monitoring configuration items, etc. In addition, there is a 32bit RAM register space open to users to allocate and store, to meet the personalized needs of users to the greatest extent. For example, such compact portable devices can make use of this kind of function, flexibly configure them according to the needs of each user, and can more accurately meet the actual needs of each user.

 RX8130CE Also has a very useful function, is the main and backup power management and backup battery charging control. When an equipment is in operation, sometimes the power supply will be unstable under the interference of uncertain external factors. At this time, in order to maintain the stable operation of the system, there must be a main and backup power supply management. This is particularly important for the real-time clock module used as the heart of the device. If it is specially equipped with an external power management circuit, not only does the circuit volume increase, the power consumption increases, but also adds a lot of additional costs. RX8130CE This function is built-in, so that the real-time clock module can stably and continuously provide the clock source for the system, and reduce the burden and increase the stability of the system. In addition, the RX8130CE also has a built-in backup battery charging management function. Users simply need to directly connect to the VBAT pin, configure the relevant register, and they can obtain a stable and efficient backup power supply by using only a cheap EDLC device. This is very suitable for applications such as dashcam, which require both backup power requirements and very high cost requirements. Compared to previous solutions, we can reduce the number of devices by at least about one-third, significantly reducing the overall volume and cost.

It's also worth mentioning that the RX8130CE's configurable delay reset function. This function can realize a function similar to the upper and lower voltage monitoring. Through the reset foot connected to the MCU can prevent the MCU from working in an abnormal state because the system power supply is too slow in the upper and lower power process. For portable devices, there will be repeated operation of up and down power, and it is easy to cause abnormal in the process of up and down power, which requires this kind of up and down voltage monitoring function to enhance the robustness of the system. RX8130CE Through the integration of this functional module, users can further reduce the use of peripheral devices and improve the overall efficiency. This function can also be adjusted through the internal register value, and can be adapted to the MCU with different working voltage range, which can meet more application scenarios, such as small lithium battery power supply wearable products, button battery power supply intelligent controller, etc.