5.3.1 10BASE-T1S PCS Control

Name: T1SPCSCTL
Address: 0x08F3

Bit 15141312111098 
 RSTLBEDUPLEX 
Access R/W SCR/WRORORORORORO 
Reset 00000001 
Bit 76543210 
  
Access RORORORORORORORO 
Reset 00000000 

Bit 15 – RST PCS Reset

When this bit is set, the PCS 4B5B encoder/decoder, scrambler/descrambler, and frame encoder/decoder blocks will be reset.
Note: This bit is self-clearing. When setting this bit, do not set other bits in this register.
ValueDescription
0Normal Operation
1PCS reset

Bit 14 – LBE PCS Loopback Enable

When this bit is set, data from the MAC will be passed through the PHY to the PCS and returned back to the MAC. This tests the full path from the MAC media interface through the PCS scrambler/descrambler and 4B/5B encoder/decoder.

Important: PLCA must be disabled when the PCS loopback mode is enabled.
ValueDescription
0Disable PCS loopback mode
1Enable PCS loopback mode

Bit 8 – DUPLEX Duplex Mode

Note: Only half-duplex operation is supported. This bit is always 1.
ValueDescription
0Full-duplex operation
1Half-duplex operation