> The problem is when I try to read a data byte from the PIC.
> I get the read request, writes my data byte to SSPBUF.
> I reenable the clock by setting CKP. The data is output,
> but the first bit (msb) is missing.
> If I insert a looong delay (10-20ms) at my PC before I read
> and take SCL high, the SDA will change at the same time as SCL.
>
> Hevard Txrring

Hello Hevard,

I had such a problem with dodgy MSBs.
I found SDA rising at the same time as SCL.
Therefore the SDA setup time was not being satisfied.
I had a look at fig 11-19 of the PIC data book.
SDA becomes D7 when SSPBUF is loaded.
SCL rises when CKP is set.

You must wait about 5 microseconds between these two events.

That fixed it for me.