PLL / Phase Lock Loop Controller

[RF_ice]

Hi, how can I set my ADF4193 PLL chip to automatically output the desired freq upon startup without using microcontroller? Is there some chip out there that is like a bios in our desktop motherboard that can initialize my PLL chip?

Let's put it another way, my PLL R and N divders registers are programmable through a three-wire serial interface and I only need the PLL to run for a fixed frequency operation. so my question is, if PLL frequency is fixed what's the easiest way of programming the PLL? microcontroller? or EEPROM? Please Advice, thanks!

 

[biff44]

Usually a cheap microcontroller does the trick. A microchip flash part is acommon choice. You could do it with a small fpga too. I think just a simple memory device will have trouble getting the timing right between the data, enable, and data clock lines. After you figure out how to clock the data out properly, you might as well have used a $1 microcontroller.