LAN8740A Datasheet, PDF (77/136 Pages) Microchip Technology – Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology

LAN8740A/LAN8740Ai
4.2.18 SPECIAL CONTROL/STATUS INDICATIONS REGISTER
Index (In Decimal): 27
Size:
16 bits
Bits
Description
15 AMDIXCTRL
HP Auto-MDIX control:
0 = Enable Auto-MDIX
1 = Disable Auto-MDIX (use 27.13 to control channel)
14 RESERVED
13 CH_SELECT
Manual channel select:
0 = MDI (TX transmits, RX receives)
1 = MDIX (TX receives, RX transmits)
12 RESERVED
11 SQEOFF
Disable the SQE test (Heartbeat):
0 = SQE test is enabled
1 = SQE test is disabled
10:5 RESERVED
4 XPOL
Polarity state of the 10BASE-T:
0 = Normal polarity
1 = Reversed polarity
3:0 RESERVED
Type
R/W
NASR
Default
0b
RO
-
R/W
0b
NASR
RO
-
R/W
0b
NASR
RO
-
RO
0b
RO
-
 2013-2015 Microchip Technology Inc.
DS00001987A-page 77