At 11:18 12/03/97 +0100, you wrote: >Nishant, > >it sounds, as if you wanted to use I2C master mode, to control >other I2C devices; that's impossible, because only I2C slave >mode is implemented in 16C74 hardware. > >To use I2C master mode, you have to do every bit change in software, >so you can use every other PIC. > >regards, > >Wolfram > Are you suggesting that you cannot use the i2c control registers to perform output of data and interrupt on receive etc while acting as a master? I can see that you would have to generate Sr, St and NACK yourself for bus master control purposes but cannot see a problem with the general data transmission to and fro. Cheers *************************************************************************** M. Harrison TEL (00 44) 1235 445288 Space Science Division Fax (00 44) 1235 445848 Rutherford Appleton Lab email work: m.c.harrison@rl.ac.u k Building R25 Room 2.124 email home:mike@leyenda.demon.co .uk Chilton Oxon OX11 0QX UK ***************************************************************************