Here is the circuit diagram of the DS1302 pin function and application circuit. The DS1302 is a high-performance, low-power real-time clock (RTC) with an integrated SRAM, compatible with the DS1202. It can accurately track time down to the second, including year, month, day, weekday, hour, minute, and second, while also supporting leap year compensation. The device operates within a wide voltage range of 2.5V to 5.5V, making it suitable for various applications.
The DS1302 uses a three-wire interface for communication with the CPU, allowing for fast data transfer in burst mode. This makes it efficient for transferring multiple bytes of clock or RAM data at once. It features a 31 x 8 RAM register for temporary data storage, which is useful for applications requiring quick access to small amounts of data.
The DS1302 is an upgraded version of the DS1202, offering improved functionality such as dual power pins for main and backup power supply. This allows the device to maintain continuous operation even when the main power is disconnected. Additionally, it supports trickle charging of the backup power supply with a very low current, ensuring long-term reliability.
Pin Function and Structure: Figure 1 shows the pin layout of the DS1302. Vcc1 is the backup power supply, while Vcc2 is the main power supply. The clock can continue running even when the main power is turned off. The DS1302 automatically selects the higher of the two voltages to power the device. When Vcc2 is greater than Vcc1 + 0.2V, it powers the chip; otherwise, it uses Vcc1.
X1 and X2 are the crystal oscillator inputs, typically connected to a 32.768kHz external crystal. RST is the reset/chip select line that initiates all data transfers by going high. This signal serves two purposes: it activates the control logic to allow sending address/command sequences to the shift register, and it can terminate data transfers during single-byte or multi-byte operations. When RST is high, the DS1302 is ready for operation. If RST is pulled low during a transfer, the process stops, and the I/O pin goes into a high-impedance state.
During power-up, RST must remain low until the voltage reaches at least 2.5V. Also, RST should only be set high when the SCLK signal is low. I/O is a bidirectional serial data input/output line, used for communication with the microcontroller. SCLK is always an input, controlling the timing of data transfers.
Editor's Note: Circuit Diagram
Yonghao Wire Company is committed to providing high quality electrical products, taking YC02 photovoltaic cable connectors as an example, whose superior performance makes them a reliable choice. We meet our customers' needs with innovative technology and superior quality, providing reliable power connectivity solutions for the renewable energy industry.
Applicable scenarios include photovoltaic power plants, solar power generation systems, outdoor photovoltaic equipment, etc., to provide reliable electrical connections for these environments to ensure the efficient operation of solar power generation systems.
YC02 photovoltaic cable connector has the following advantages:
High reliability: The YC02 connector design is carefully optimized to ensure a stable and reliable electrical connection in the photovoltaic system, reducing the failure rate.
Strong water resistance: with excellent waterproof performance, adapt to outdoor, bad weather and other complex environments, to ensure long-term stable operation of the connector.
Corrosion resistance: Strong corrosion resistance, can maintain the stability of the connector in harsh weather conditions, extend the service life.
Anti-ultraviolet: It has anti-ultraviolet characteristics and is suitable for outdoor photovoltaic power plants and other scenes that need to be exposed to sunlight for a long time.
High temperature resistance: YC02 connectors maintain stable performance in high temperature environments and are suitable for devices such as photovoltaic battery modules and inverters.
Applicable scenarios include photovoltaic power plants, solar power generation systems, outdoor photovoltaic equipment, etc., to provide reliable electrical connections for these environments to ensure the efficient operation of solar power generation systems.
solar connect, cable connector, connector terminal,pv connector, dc solar cable connector
Suzhou Yonghao Cable Co.,Ltd. , https://www.yonghaocable.com