Overview

This RTC add-on board provides a battery-backed real-time clock based on the PCF8583 and interfaces to microcontrollers by I2C serial bus. The board is designed to plug onto MikroElektronika's PIC development and prototyping boards, although could also be interfaced to your own circuits and other development boards.

PCF8583 Clock/Calendar with 240 x 8-bit RAM

The PCF8583 is a clock/calendar circuit based on a 2048-bit static CMOS RAM organized as 256 words by 8 bits. Addresses and data are transferred serially via the two-line bidirectional I2C bus. The built-in word address register is incremented automatically after each written or read data byte. Address pin A0 is used for programming the hardware address, allowing the connection of two devices to the bus without additional hardware. The built-in 32.768kHz oscillator circuit and the first 8 bytes of the RAM are used for the clock/calendar and counter functions. The next 8 bytes may be programmed as alarm registers or used as free RAM space. The remaining 240 bytes are free RAM locations.

Features

• Based on NXP (formerly Philips) PCF8583 real-time clock.
• Battery backup.
• Interfaces to microcontrollers using I2C serial interface.
• Connects directly to MikroElektronika's PIC development and prototyping boards.
• Supported by example programs provided with MikroElektronika's mikroBASIC, mikroC and mikroPascal PRO for PIC compilers.