Altera_Forum
Honored Contributor
13 years agoHow to report Tco, Tsu, Th of a derived clock or PLL clock?
Hello,
I am using a EP2C8 device and using classic timing analysiser to check the timing relationship of my design. I used a PLL and used the PLL output as a global clock. How can I obtain the Tco, Tsu and Th related to the PLL output clock? Quartus only report these parameter related to the PLL input clock. PLL input: 65.536M PLL output 1: 51.2M, use as FPGA global clock PLL output 2: 51.2M, output from PLL output pin to drive external device(SDRAM) I want to adjust the phase relationship between PLL output 1 and PLL output 2. I can not use 51.2M clock chip directly because I had to use 65.536M clock to drive another device. best, regard