LAN8740A Datasheet, PDF (72/136 Pages) Microchip Technology – Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology

LAN8740A/LAN8740Ai
4.2.13 MODE CONTROL/STATUS REGISTER
Index (In Decimal): 17
Size:
16 bits
Bits
15:14
13
12:10
9
8:7
6
5:2
1
0
Description
RESERVED
EDPWRDOWN
Enable the Energy Detect Power-Down (EDPD) mode:
0 = Energy Detect Power-Down is disabled.
1 = Energy Detect Power-Down is enabled.
Note:
When in EDPD mode, the device’s NLP characteristics can be
modified via the EDPD NLP/Crossover Time/EEE Configuration
Register.
RESERVED
FARLOOPBACK
Enables far loopback mode (i.e., all the received packets are sent back simul-
taneously (in 100BASE-TX only)). This bit is only active in RMII mode. This
mode works even if the Isolate bit (0.10) is set.
0 = Far loopback mode is disabled.
1 = Far loopback mode is enabled.
Refer to Section 3.8.12.2, "Far Loopback" for additional information.
RESERVED
ALTINT
Alternate Interrupt Mode:
0 = Primary interrupt system enabled (Default)
1 = Alternate interrupt system enabled
Refer to Section 3.6, "Interrupt Management" for additional information.
RESERVED
ENERGYON
Indicates whether energy is detected. This bit transitions to “0” if no valid
energy is detected within 256 ms. It is reset to “1” by a hardware reset and is
unaffected by a software reset. Refer to Section 3.8.3.2, "Energy Detect
Power-Down (EDPD)" for additional information.
RESERVED
Type
RO
R/W
RO
R/W
RO
R/W
RO
RO
R/W
Default
-
0b
-
0b
-
0b
-
1b
0b
DS00001987A-page 72
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