SNLS579A April 2018 – November 2018 DP83TC811S-Q1
When the DP83TC811S-Q1 is active, the Signal Quality Indicator may be used to determine the quality of link based on SNR readings made by the device. SQI is presented as both a four-level indication and a percentage based on the calculated SNR value. Signal quality indication is accessible through the SQI Register 0x0198 – Signal Quality Indication Register. SQI is continuously monitored by the DP83TC811S-Q1 to allow for real-time link signal quality status.
Bits[9:8] in register 0x198 provide signal quality status. For SQI value, convert bits[7:0] to decimal form.
|BIT||BIT||SIGNAL QUALITY STATUS||SIGNAL QUALITY INDICATION|
|0||0||No Link||SQI ≤ 40|
|1||0||Good Link||40 < SQI ≤ 70|
|1||1||Excellent Link||SQI > 70|
Signal-to-noise ratio is accessible through the SNR Register 0x0197 – Signal-to-Noise Ratio Result Register. To convert this binary register field to dB, follow these steps: