LAN8700 Datasheet, PDF (35/74 Pages) SMSC Corporation – ±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWR TM in a Small Footprint

LAN8700/LAN8700i
TABLE 5-30: REGISTER 0 - BASIC CONTROL
Address
Name
Description
0.15
Reset
1 = software reset. Bit is self-clearing. For best results,
when setting this bit do not set other bits in this
register. The configuration (as described in
Section 5.4.9.2) is set from the register bit values,
and not from the mode pins.
0.14
Loopback 1 = loopback mode,
0 = normal operation
0.13
Speed Select 1 = 100Mbps,
0 = 10Mbps.
Ignored if Auto Negotiation is enabled (0.12 = 1).
0.12
Auto-Negotiation 1 = enable auto-negotiate process
Enable
(overrides 0.13 and 0.8)
0 = disable auto-negotiate process
0.11
Power Down 1 = General power down mode,
0 = normal operation
0.10
Isolate
1 = electrical isolation of PHY from MII
0 = normal operation
0.9
Restart Auto- 1 = restart auto-negotiate process
Negotiate
0 = normal operation. Bit is self-clearing.
0.8
Duplex Mode 1 = Full duplex,
0 = Half duplex.
Ignored if Auto Negotiation is enabled (0.12 = 1).
0.7
0.6:0
Collision Test
Reserved
1 = enable COL test,
0 = disable COL test
Mode
RW/
SC
RW
RW
RW
RW
RW
RW/
SC
RW
RW
RO
Default
0
0
Set by
MODE[2:0]
bus
Set by
MODE[2:0]
bus
0
0
0
Set by
MODE[2:0]
bus
0
0
TABLE 5-31: REGISTER 1 - BASIC STATUS
Address
Name
Description
1.15
1.14
1.13
1.12
1.11
1.10:6
1.5
1.4
100Base-T4
100Base-TX Full
Duplex
100Base-TX Half
Duplex
10Base-T Full
Duplex
10Base-T Half
Duplex
Reserved
Auto-Negotiate
Complete
Remote Fault
1 = T4 able,
0 = no T4 ability
1 = TX with full duplex,
0 = no TX full duplex ability
1 = TX with half duplex,
0 = no TX half duplex ability
1 = 10Mbps with full duplex
0 = no 10Mbps with full duplex ability
1 = 10Mbps with half duplex
0 = no 10Mbps with half duplex ability
1 = auto-negotiate process completed
0 = auto-negotiate process not completed
1 = remote fault condition detected
0 = no remote fault
1.3
Auto-Negotiate 1 = able to perform auto-negotiation function
Ability
0 = unable to perform auto-negotiation function
1.2
Link Status 1 = link is up,
0 = link is down
1.1
Jabber Detect 1 = jabber condition detected
0 = no jabber condition detected
1.0
Extended
1 = supports extended capabilities registers
Capabilities ^{0 = does not support extended capabilities registers}
Mode
RO
RO
RO
RO
RO
Default
0
1
1
1
1
RO
0
RO/
0
LH
RO
1
RO/
X
LL
RO/
X
LH
RO
1
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DS00002260A-page 35