Post
Topic
Board Hardware
Re: How can I clock Avalon to 325 MHz and beyond?
by
goxed
on 21/06/2013, 11:37:37 UTC
Question: what should be buf[6] and buf[7] for 325MHz, 350MHz, and 375MHz?

   if (frequency == 256) {
      buf[6] = 0x03;
      buf[7] = 0x08;
   } else if (frequency == 270) {
      buf[6] = 0x73;
      buf[7] = 0x08;
   } else if (frequency == 282) {
      buf[6] = 0xd3;
      buf[7] = 0x08;
   } else if (frequency == 300) {
      buf[6] = 0x63;
      buf[7] = 0x09;
   }

Use these at your own risk!

For 325 MHz: buf[6] = 0x2b and buf[7] = 0x0a
For 350 MHz: buf[6] = 0xf3 and buf[7] = 0x0a
For 375 MHz: buf[6] = 0xbb and buf[7] = 0x0b
The meaning of these values is documented on page 6 of the Avalon ASIC (A3256-Q48) datasheet.
Thanks, I guess I need to take a good look at the datasheet first, and then re-compile cgminer with the new avalon driver.