The DS1307 has the proud title of being the de ... The Raspberry Pi, like many computers from the 1980s, lacks a real time clock. This obviates the need for a battery, but can also cause havoc ...

For the most part, the build is what you would expect: a 16×8 LED Matrix display driven by a TLC5920 LED driver, with an Arduino that uses a DS1307 RTC (real-time clock) with a coin cell ...

only implementation of a synchronization core allowing to read and write a I2C Realtime Clock (RTC) like the DS1307 or MCP7941x. Access to the RTC is done from the FPGA without software interaction.