SNLS579A April 2018 – November 2018 DP83TC811S-Q1
PRODUCTION DATA.
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[9] | BIT[8] | SIGNAL QUALITY STATUS | SIGNAL QUALITY INDICATION |
---|---|---|---|
0 | 0 | No Link | SQI ≤ 40 |
0 | 1 | Intermittent/Poor Link | |
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: