I2C ON P89C51RD2(Philips micro controller)

1. means we can implement CLK & DATA lines
using port bits say in p89c51rd2 we can take port1(programmable).is it correct?

2. u r mentioning that special PHILIPS BUS is needed.can't we take some low impedence wire?

1. means we can implement CLK & DATA lines
using port bits say in p89c51rd2 we can take port1(programmable).is it correct?

2. u r mentioning that special PHILIPS BUS is needed.can't we take some low impedence wire?

we can implement CLK & DATA lines
using port bits say in p89c51rd2 we can take port1(programmable).is it correct?
In The P89C51RD2 port 1 bits 6 and 7 are open collector for precisely this purpose.

u r
no, the wire does not need to be microohms

Erik

Yes, I meant that you could use PIO pins such as those on port 1 as the clock and data lines for the I2C interface. Software will have to toggle the two pins appropriately to make it look like an I2C transaction to the other device(s).

I suggested that you might want the Philips I2C spec simply so that you'd be sure how to program your emulated I2C interface. I wasn't even thinking of the physical connection, but rather the logical waveforms that need to appear on those two pins.