6
Additional Hardware Control Functions
In addition to the MF pins, there are ten pins (#41 - 50) labeled as CFG0, FDE, CFG1, TRST and MDDIS. These pins
control the status of the applicable function by installing or removing a jumper. Table 6 shows these jumpers and their
functions.
Table 5:
Operating Speed Advertisement Settings
MF4 Input
Voltage Levels
CFG1
Function
If Auto-Negotiate Enabled via MF0
V
MF
1, V
MF
4
Jumper Not Installed
Advertise all capabilities, Ignore FDE
V
MF
1, V
MF
4
Jumper Installed
Advertise 10 Mbps only, Follow FDE
V
MF
2, V
MF
3
Jumper Not Installed
Advertise 100 Mbps only, Follow FDE
V
MF
2, V
MF
3
Jumper Installed
Advertise 10/100 Mbps, Follow FDE
Table 6:
Additional Hardware Control Interface Functions
Jumper
Label
Function
Status
Jumper
Installed
Jumper Not
Installed
CFG0
Restart Negotiation
(when Auto-Neg enabled)
1
Enable
X
Disable
X
Speed Select
(when Auto-Neg disabled)
1
10Mbps
X
100Mbps
X
FDE
Full Duplex Enable
X
Disable
X
CFG1
Speed Advertisement Capabilities
(when Auto-Neg enabled)
1
When Auto-Neg enabled, CFG1works in combina-
tion with MF4 to control operating speed advertising
capabilities. See Table 5 for details
Link Test
(when Auto-Neg disabled)
1
Enable
X
Disable
X
TRSTE
Tristate
(MDC and MDIO are not affected)
Tristates
MII Data Interface
X
Normal
Operation
X
MDDIS
MDIO Port
Enable
X
Disable
X
1. Auto-negotiation is set via MF0.
