Using a DS1307 with a PIC Microcontroller - Application Note - Maxim
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Using a DS1307 with a PIC Microcontroller - Application Note - Maxim
29 Sep 2006 ... Abstract: This application note is intended to demonstrate an application using
the DS1307 ... clock (RTC) with a Microchip PIC microcontroller.
Using a DS1307 with a PIC Microcontroller Sep 29, 2006 Abstract: This application note is intended to demonstrate an application using the DS1307 real-time clock (RTC) with a Microchip PIC microcontroller. The software example includes basic operating routines. A schematic of the application circuit is included.
Discussion This application note demonstrates how to use the DS1307 real-time clock (RTC) with a Microchip PIC16F628 microcontroller. The example code, written in assembly code, includes a routine for reading the time and date from the RTC and a routine to write time and date data to the RTC from user entries.
Operation The program uses two general-purpose port pins on the microcontroller to communicate with the DS1307 using the I²C serial interface. The microcontroller's internal UART drives two port pins, which are connected to a DS232 line driver/receiver. User inputs and data outputs from the program are passed through the RS-232 interface from a terminal emulator program on a PC to the microcontroller. The RS232 DTR input line controls the microcontroller's reset input. The microcontroller in this example is a PIC16F628. For information on the microcontroller used in this application note, including available programming tools, visit the Microchip web site. The software is shown in Figure 1. A schematic of the circuit is shown in Figure 2.
Page 1 of 3
Download (TXT, 10kB) Figure 1. Program Listing
More detailed image (PDF, 126kB) Figure 2. Schematic drawing of the DS1307 circuit used with a PIC microcontroller.
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