clock frequency conversion for i2c using pic

Replies

• 

  narayana murthy

  i think your ic is micro processor or controller is yes
  the processor and controller will take care of it and i think the 400Khz will be operating frequency of ic so no matter of what it takes
  up to my knowledge it dont make any problem
  hope i am clear in this
• 

  Harshad Italiya

  awaiting

  Hello everyone
  
  i am using pic16f877a to send digital data to an ic using i2c communication. The clock frequency(SCL) given of the other ic is 400kHz .for initializing the i2c communication how should i convert it into a 8 bit format or will pic take care of it?
  
  Thank you

  Are you using Hardware I2C or Software I2C.
  If Hardware I2C then according to the register setting it will generate the SCL (Clock Frequency).
• 

  awaiting

  Thank you guys for you replies.
  
  i got some output using the default value (1000 0000),but the frequency shown on the DSO was varying a lot,from 100MHz to 500MHz when its range is only upto 150MHz!,may be due to a fault in it.
  but the FM wave was clearly seen,that means atleast the i2c communication was successful.
  
  abt godfather:can you pl elaborate on the register settings
• 

  Harshad Italiya

  awaiting

  Thank you guys for you replies.
  
  i got some output using the default value (1000 0000),but the frequency shown on the DSO was varying a lot,from 100MHz to 500MHz when its range is only upto 150MHz!,may be due to a fault in it.
  but the FM wave was clearly seen,that means atleast the i2c communication was successful.
  
  abt godfather:can you pl elaborate on the register settings

  First of all let me know which microcontroller you are using? There may be I2C peripheral and that peripheral have its internal register like Control and Status of I2C.
• 

  awaiting

  i am using sn761633 as the other ic along with pic16f877a.It generates FM signal and requires digital data for setting different conditions.
• 

  Harshad Italiya

  awaiting

  i am using sn761633 as the other ic along with pic16f877a.It generates FM signal and requires digital data for setting different conditions.

  So i think PIC16f877 has inbuilt I2C peripheral?