VT Tracking - 1.0 English

Versal ACAP Programmable Network on Chip and Integrated Memory Controller LogiCORE IP Product Guide (PG313)

Document ID
PG313
Release Date
2022-12-14
Version
1.0 English
Calibration is performed at device configuration, but during normal operation the voltage and temperature may change. Voltage and temperature (VT) drift can have an effect on the alignment of the DQS with the DQ bits. VT tracking is a feature where the internal clocks that have been matched with the memory clock strobes (DQS) are monitored and adjusted to track any variations from the original calibrated values.
Table 1. VT Tracking Registers
Register Name Quantity Description
VTTRACK_RLDLYQTR Nibble The number of fine taps in a quarter clock period
VTTRACK_RLDLYQTR_MAX Nibble The largest number of fine taps in a quarter clock period since the tracking has started
VTTRACK_RLDLYQTR_MIN Nibble The smallest number of fine taps in a quarter clock period since the tracking has started