Datasheet

 2013-2015 Microchip Technology Inc. DS00001987A-page 77

LAN8740A/LAN8740Ai

4.2.18 SPECIAL CONTROL/STATUS INDICATIONS REGISTER

Index (In Decimal): 27 Size: 16 bits

Bits Description Type Default

15 AMDIXCTRL

HP Auto-MDIX control:

0 = Enable Auto-MDIX

1 = Disable Auto-MDIX (use 27.13 to control channel)

R/W

NASR

14 RESERVED RO -

13 CH_SELECT

Manual channel select:

0 = MDI (TX transmits, RX receives)

1 = MDIX (TX receives, RX transmits)

R/W

NASR

12 RESERVED RO -

11 SQEOFF

Disable the SQE test (Heartbeat):

0 = SQE test is enabled

1 = SQE test is disabled

R/W

NASR

10:5 RESERVED RO -

4 XPOL

Polarity state of the 10BASE-T:

0 = Normal polarity

1 = Reversed polarity

RO 0b

3:0 RESERVED RO -