Main performance indicators of DS1302:
★ The real-time clock has the ability to calculate seconds, minutes, hours, days, weeks, months, and years before 2100, as well as the ability to adjust leap years
★ 31 8-bit temporary data storage RAM
★ Serial I/O port mode makes the number of pins less
★ Wide range of working voltage 2.0-5.5V
★ When working current is 2.0V, less than 300nA
★ There are two transmission methods when reading/writing clock or RAM data, single-byte transmission and multi-byte transmission character group method
★ 8-pin DIP package or optional 8-pin SOIC package according to surface assembly
★ Simple 3-wire interface
★ Compatible with TTL Vcc=5V
★ Optional industrial temperature range -40 +85
★ Dual power supply tubes for main power supply and backup power supply
The DS1302 real-time clock module parameters are as follows:
1. The PCB is a single panel, size: 4.85CM*2.4CM
2. The backup battery is CR2032 battery, voltage 3V, current 260mAh, non-rechargeable battery. The theoretical data is kept for more than 10 years!
3. Crystal oscillator 32.768KHz
4. DS1302 is a large 8-pin direct-insertion chip made in China. There is an IC socket under the chip, which is convenient to replace and plug the chip.
5. The working voltage of the module is compatible with 3.3V/5V and can be connected with 5V and 3.3V microcontrollers
6. Working temperature: 0°---70°
Wiring method (take the provided program as an example, you can connect any IO port, just modify the port definition in the program):
VCC→+5V/3.3V
GND→GND
CLK→MCU
DAT→SCM
RST→SCM
Precautions:
1. Don't connect VCC and GND reversely, so as not to burn the chip
2.51 The P0 port of the microcontroller needs to be connected to a pull-up resistor. If your microcontroller is not connected to a pull-up resistor, you can connect the data line to other ports
Picture of empty circuit board:
The module adopts high-quality FR4PCB military-grade A material board, the tolerance of the board and the stability of some parameters, the A material is very strong, which benefits from the high price of other materials. The parameters of the components are directly printed on the PCB board, which can be directly soldered without referring to the circuit diagram, which is quite convenient. The PCB batch is different, the color will be different, please understand.
Features of PCB board:
1. The pad is enlarged and sprayed with tin, which is easy to solder, and the pad is not easy to fall off after repeated soldering;
2. It is not prone to spontaneous bending (referring to bending caused by non-manpower conditions), and poorer plates will bend with time and environmental changes.
3. The impedance is more stable and reliable;
Delivery list of parts:
Component name quantity
Number of component names
PCB board 1
32.768K crystal oscillator 1
8P IC seat 1
DS13021
CR2032 battery holder 1
2032 battery 1
10K resistor 4
10UF/25V capacitor 1
5P header 1
3MMLED1
Precautions for purchasing spare parts:
1. There are many types of spare parts, and it is troublesome to distribute the goods. People are not sages. We cannot guarantee that there are many components in each package. If there are few individual parts, we will not reissue, only refund the difference, and we will try our best Components, I hope you understand.
2. Individual components, such as resistors and capacitors, are temporarily out of stock, and the seller will replace them with components with nearby values based on their symbolic circuit principles.
3. After welding, please debug it by yourself. Welding can be successful if there is no error. If the welding fails, our shop is not responsible. We cannot guarantee that your welding will be 100% successful. This is the reason why maintenance workers are needed on the factory production line. The components sent are all brand new, but we cannot guarantee that the brand new components are all good, and we can’t test each component before shipping. If this is the case, the parts are more expensive than the finished product, so if there is a drop We refund the difference according to the retail price of the components in the store. If the components are damaged, the buyer is responsible for it. But we promise to achieve 100% after-sales service, and try our best to assist all friends to complete the production. Therefore, when the finished product does not reach the effect we described, please do not rush to give us an evaluation, remember to contact our after-sales service. Thank you for your cooperation, Xingxiangrong Electronics wishes everyone a happy shopping!
If you agree to these 3 items, please buy the finished product. We will only ship the finished product after debugging and testing. Thank you!
Picture after welding:
Disclaimer: Each test before shipment, only after passing the shipment, you must have relevant electronic knowledge to use this product, because the input power voltage is too high or improper use, etc. will damage the module, and because of the relatively small profit, so the return after signing , Replacement, maintenance, freight is paid by the buyer, and the photo is for agreeing to this statement. If you disagree, please go around, thank you.
