Nes asked:

> 1) Can the PIC16C62A operate at fastmode 400Khz specs?

Yes, if the PIC's clock is fast enough.

> The datasheet says that it can at standard mode.
> But in their I2C
> overview it state that this device can operate at 400Khz or fastmode.
> And this seems confusing.

Assuming you are using the SPP hardware in slave mode, the spec
says that the SSP slave will work on a fast mode system if the PIC's
main clock frequency is at least 10 MHz.  There are a few other
timing issues with set up times when there is clock stretching.

> 2) My PC acting as a master is rather slow probably even less than
> 100khz below the standard mode. What is the best way to simulate or emulate
> in software with a data transmitting a 100Khz maximum flat and 400Khz max to
> test the standard and fast mode specs respectively?

There is a I2C interface chip made by Philips, that could be
interfaced to the PC to be a fast mode master.  I don't know the part
number, check their web site http://www.semiconductors.philips.com
They offer a PC-based tester / excerciser, too, but it may be
expensive.  The I2C bus specs are there too.

There's a company called MicroComputer Control (MCC) that makes
I2C tools, check http://www.mcc-us.com

I have their bus analyzer, which works very well.

> 3) Lastly, did anyone in the list tried to operate pic I2C to operate
> at fastmode? If yes how. Any problem encountered.

Not I, I am in "slow" mode, with a 4 MHz PIC as a bit-banged master.

Regards,

Barry.
------------
Barry King, KA1NLH
Engineering Manager
NRG Systems "Measuring the Wind's Energy"
Hinesburg, Vermont, USA
www.nrgsystems.com