hi,

does somebody here have worked hardware which utilizes SPI with Atmel X2 chips (i.e. RB2/RC2/RD2/ED2/IC2/ID2 etc)?

Could you look with scope at the master clock and report its speed, please?

The problem is that I am confused with that datasheets say and Keil simulator shows.
For example, I have setup next configuration:
- OSC = 18.432MHz;
- X2 mode is ON;
- SPIX2 bit is cleared (so SPI clock divider 1/6 is used instead of 1/12);
SPR[2..0] = F_PER/2 (maximum SPI rate)

Now my calculations based on datasheet says that SPI rate should be 1.536Mbit/s (18.432/6/2);
but Keil simulator shows 9.216Mbit/s (18.432/2).
My first idea was that Keil just ignores SPIX2 settings but when I set bit SPIX2 (switch to divider 1/12) then it shows 4.608Mbit/s. As result I see that simulator uses divider 1/1 or 1/2 instead 1/6 or 1/12.

As for now, I dont know either simulator or datasheet provide wrong information. Could somebody check real rate of SPI with such devices and report it here, please?

Thanks,
Oleg