- As mentioned in Assumptions, IBERT PS-GTR uses the psu_cortexr5_0 core, so no other applications should use this core.
- TCM0 and TCM1 memory are combined to form a unified memory for IBERT PS-GTR. Any other processor core should not access this memory while IBERT PS-GTR is running.
- The error counter is 16-bits, and the sample counter is 32-bits. Each sample can have 8 bits of error count. Therefore on the edges, the error counter can saturate with a sample count value of 8192. PS-GTR does not stop the sample counter even if the error counter saturates. A prescale=0 produces 8192 samples and thus total samples of 8192 *8 (65536), and thus the outside edges of the eye could show a BER of e-01 or less depending on the prescale selected.
- The EyeScan assumes there is a link present. If there is no link, the EyeScan cannot complete. Canceling the EyeScan stops the command sequence, but the state of the previous point scan is unknown.
- If you run EyeScan and because of no link, the EyeScan does not complete, set the register L*_TM_MISC_ST_0.EYE_SURF_RUN to 0 for the given lane before you run the EyeScan again.
- If you run EyeScan on a lane that is either powered down or Display Port, it immediately stops, and the scan is marked as incomplete. EyeScan does not work in either scenario.