LAN8740A Datasheet, PDF (78/136 Pages) Microchip Technology – Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology

LAN8740A/LAN8740Ai
4.2.19 CABLE LENGTH REGISTER
Index (In Decimal): 28
Size:
16 bits
Bits
15:12
11:0
Description
Cable Length (CBLN)
This four bit value indicates the cable length. Refer to Section 3.8.11.2,
"Matched Cable Diagnostics" for additional information on the usage of this
field.
Note:
This field indicates cable length for 100BASE-TX linked devices
that do not have an open/short on the cable. To determine the
open/short status of the cable, the TDR Patterns/Delay Control
Register and TDR Control/Status Register must be used. Cable
length is not supported for 10BASE-T links. Refer to Section
3.8.11, "Cable Diagnostics" for additional information.
RESERVED
Type
RO
RO
Default
0000b
-
DS00001987A-page 78
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