JAJSON9 May 2022 DP83TC813R-Q1 , DP83TC813S-Q1
PRODUCTION DATA
PCS Loopback will loop back data prior to it exiting the PCS and entering the PMA. Data received from the MAC on the transmit path is brought through the digital block within the PHY where it is then routed back to the MAC through the receive path. The DP83TC813 receive PMA circuitry is configured for isolation to prevent contention.
Write register 0x0016 = 0x0102
Write register 0x0619 = 0x1555
Write register 0x0624 = 0x55BF
Data can also be checked internally by reading registers 0x063C, 0x063D, 0x063E
Write register 0x0619 = 0x0557
Write register 0x0624 = 0x55BF
Data generate by the internal PRBS will be transmitted over the MDI and the MAC interface.