ZHCSJ67A December 2018 – August 2019 DP83825I
PRODUCTION DATA.
When operating in 10BASE-Te or 100BASE-TX mode, signals can be looped back after the analog front-end. Analog Loopback requires 100-Ω terminations across pins #1 and #2, as well as 100-Ω terminations across pins #3 and #6 at the RJ45.
Analog Loopback is enabled by setting bit[3] in the BISCR.