From my understanding of the hardware reference manual it says TWIDIV = CLKLOW + CLKHI = TWI_CLOCK period / 10 MHz time reference. Is the "10 MHz time reference" really a constant or is it derived from another setting? In the I2C spec, the 10 MHz reference appears to only be applicable for HS mode. Since I’m not using a HS part does the value of the prescale in TWIMITR really get set to PRESCALE = fPCLK/10 MHz or is that something different also? I ask because I have a scope attached to an ADSP-21469 EZ board and SCL is 200 kHz when TWIDIV = 0xC0D.