High
purity Tin wire is a special target material, Vacuum coating target technology
was used in Automobile glass.
Pure Tin Wire,Tin Wire,Tin Solder Wire,Tin Plated Copper Wire Shaoxing Tianlong Tin Materials Co.,Ltd. , https://www.tianlongspray.com
Figure 1. Description of the DS3231 pin configuration. This application note describes the connection of the DS3231 and the 8051 microcontroller and provides a basic interface program. The microcontroller used in this article is DS2250, and the software is written in C language. How it works This program uses two general-purpose ports of a microcontroller as the master of the I²C bus, and the DS3231 as a slave device on the same bus. The program can demonstrate the setting and reading of time and date, and can read and display temperature data. Using this software can display the time, date and temperature information on the LCD monitor, here uses a standard HD44780 controller.
Figure 1 and Figure 2 show the pin arrangement and typical circuit of DS3231 respectively. Figure 3 lists the program list. 
View larger image Figure 2. Typical circuit of DS3231 
Download text file Figure 3. Sample software
Interface between DS3231 and 8051 microcontroller
Abstract: This application note provides a hardware circuit and software routine for the interface between a DS3231 and an 8051 microcontroller.