lan8720 Standard Microsystems Corp., lan8720 Datasheet - Page 44

• Manufacturer Part Number: lan8720
• Description: Small Footprint Rmii 10/100 Ethernet Transceiver With Hp Auto-mdix Support
• Manufacturer: Standard Microsystems Corp.

Revision 1.0 (04-15-09)
ADDRESS
ADDRESS
ADDRESS
16.15:10
17.15:14
6.15:5
16.9:6
16.5:0
17.8:7
17.13
17.12
17.10
17.11
17.9
6.4
6.3
6.2
6.1
6.0
Link Partner Auto-
Parallel Detection
Link Partner Next
Negotiation Able
Next Page Able
Silicon Revision
FARLOOPBACK
Page Received
EDPWRDOWN
LOWSQEN
Page Able
MDPREBP
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
NAME
NAME
NAME
Fault
Table 5.27 Register 6 - Auto Negotiation Expansion
Table 5.29 Register 17 - Mode Control/Status
Table 5.28 Register 16 - Silicon Revision
1 = fault detected by parallel detection logic
0 = no fault detected by parallel detection logic
1 = link partner has next page ability
0 = link partner does not have next page ability
1 = local device has next page ability
0 = local device does not have next page ability
1 = new page received
0 = new page not yet received
1 = link partner has auto-negotiation ability
0 = link partner does not have auto-negotiation ability
Four-bit silicon revision identifier.
Write as 0; ignore on read.
Enable the Energy Detect Power-Down mode:
0 = Energy Detect Power-Down is disabled
1 = Energy Detect Power-Down is enabled
Write as 0, ignore on read
The Low_Squelch signal is equal to LOWSQEN AND
EDPWRDOWN.
Low_Squelch = 1 implies a lower threshold
Low_Squelch = 0 implies a higher threshold
Management Data Preamble Bypass:
0 – detect SMI packets with Preamble
1 – detect SMI packets without preamble
Force the module to the FAR Loop Back mode, i.e. all
the received packets are sent back simultaneously (in
100Base-TX only). This bit is only active in RMII
mode, as described in
works even if MII Isolate (0.10) is set.
Write as 0, ignore on read.
DATASHEET
(more sensitive).
(less sensitive).
DESCRIPTION
DESCRIPTION
DESCRIPTION
44
Section
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
5.3.8.2. This mode
SMSC LAN8720/LAN8720i
MODE
MODE
MODE
RO/
RO/
RW
RW
RW
RW
RW
RW
RW
RO
RO
RO
RO
RO
RO
RO
LH
LH
DEFAULT
DEFAULT
DEFAULT
Datasheet
0001
00
0
0
0
0
0
0
0
0
0
0
0
0
0
0