PCF8583+PIC circuit

handsprince · Joined: 12 Mar 2006 Posts: 20

anyone can teach me how to connect pcf8583 to PIC16f877?? Thank for your kindness.

kender · Joined: 09 Aug 2004 Posts: 768 Location: Silicon Valley

Look at the fig.22 of this datasheet http://www.semiconductors.philips.com/acrobat_download/datasheets/PCF8583_5.pdf

Your PIC will be a Master transmitter. If your PIC has the hardware I2C and you want to use it, connect the SCL line to the PIC's SCL pin and SDA line to the PIC's SDA pin. If you PIC doesn't have hardware I2C, you can use any pair of digital I/O pins for bit-banged I2C. Don't forget the pull-up resistirs. For the Vcc=+5V the pulups should be 2.2k.

Good luck

Guest · Posted: Wed Mar 15, 2006 5:03 am

kender can u give me a webside that show the connection between pcf8583 and pic.... why we need pull-up resistor?? thank

PICoHolic · Joined: 04 Jan 2005 Posts: 224

As a background you should get a document describing the i2c protocol (from the net) after that start reading about the i2c hardware in any PIC (that supports i2c) datasheet.

And then you'll get the answers