Datasheet

±15kV ESD Protected MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support and flexPWR
®
Technology in a Small Footprint
Datasheet
Revision 2.3 (04-12-11) 46 SMSC LAN8700/LAN8700i
DATASHEET
Note 5.1 The default value of this field is determined by the strapping of the COL/RMII/CRS_DV
pin. Refer to Section 4.6.3, "MII vs. RMII Configuration," on page 28 for additional
information.
17.8:7 Reserved Write as 0, ignore on read. RW 00
17.6 ALTINT Alternate Interrupt Mode.
0 = Primary interrupt system enabled (Default).
1 = Alternate interrupt system enabled.
See Section 5.3, "Interrupt Management," on page 49.
RW 0
17.5:4 Reserved Write as 0, ignore on read. RW 00
17.3 PHYADBP 1 = PHY disregards PHY address in SMI access
write.
RW 0
17.2 Force
Good Link Status
0 = normal operation;
1 = force 100TX- link active;
Note: This bit should be set only during lab testing
RW 0
17.1 ENERGYON ENERGYON – indicates whether energy is detected
on the line (see Section 5.4.5.2, "Energy Detect
Power-Down," on page 52); it goes to “0” if no valid
energy is detected within 256ms. Reset to “1” by
hardware reset, unaffected by SW reset.
RO X
17.0 Reserved Write as 0. Ignore on read. RW 0
Table 5.39 Register 18 - Special Modes
ADDRESS NAME DESCRIPTION MODE DEFAULT
18.15 Reserved Write as 0, ignore on read. RW 0
18.14 MIIMODE MII Mode: Reflects the mode of the digital interface:
0 – MII interface.
1 – RMII interface
Note: When writing to this register, the default
value of this bit must always be written back.
RW,
NASR
Note 5.1
18.13:8 Reserved Write as 0, ignore on read. RW,
NASR
000000
18.7:5 MODE PHY Mode of operation. Refer to Section 5.4.9.2,
"Mode Bus – MODE[2:0]," on page 56 for more
details.
RW,
NASR
XXX
EVB8700
default
111
18.4:0 PHYAD PHY Address.
The PHY Address is used for the SMI address and for
the initialization of the Cipher (Scrambler) key. Refer
to Section 5.4.9.1, "Physical Address Bus -
PHYAD[4:0]," on page 56 for more details.
RW,
NASR
PHYAD
EVB8700
default
11111
Table 5.38 Register 17 - Mode Control/Status (continued)
ADDRESS NAME DESCRIPTION MODE DEFAULT