I have read several posts and have tried multiple things to try and get the sample rate to 8Khz using an EZ-KIT 21469 board. So far I have tried the following:
1. Setting the clock control registers to the following:
(AD1939_ADDR), CLKCTRL0, 0x81,
(AD1939_ADDR), CLKCTRL1, 0x03,
2. Setting the div0 and div1 SPORT registers to 93 and 23 for the clock and frame dividers
3. also tried lots of other combinations, can't really remember.
I am wondering, is there a shurefire way to turn off the PLL on the CODEC and then divide down the clock? Do I have to create a Precision Clock Generator and if so, which connections are important? When I bought this, the datasheet said it was capable of the 8 kHz, I just didn't realize it would be so complicated.....