I347-AT4 Datasheet, PDF (76/148 Pages) Intel Corporation – Intel® Ethernet Network Connection I347-AT4 Datasheet

I347-AT4—Programmer’s Visible State
Bits
Field
Mode
HW
Rst
11
Power Down
R/W
See
Descr
10
Isolate
RO
0x0
9
Restart Copper
Auto-Negotiation
R/W, SC
0x0
8
Copper Duplex
Mode
R/W
0x1
7
Collision Test
RO
0x0
6
Speed Selection
(MSB)
R/W
0x1
5:0
Reserved
RO
0x00
SW Rst
Description
Retain
0x0
SC
Update
0x0
Update
0x00
Power down is controlled via register 0_0.11 and 16_0.2. Both
bits must be set to 0 before the PHY will transition from power
down to normal operation.
When the port is switched from power down to normal
operation, software reset and restart Auto-Negotiation are
performed even when bits Reset (0_0.15) and Restart Auto-
Negotiation (0_0.9) are not set by the user.
Upon hardware reset this bit takes on the value of PDOWN and
(MODE[2:0] = 00x or 11x)
1 = Power down
0 = Normal operation
This bit has no effect.
Auto-Negotiation automatically restarts after hardware or
software reset regardless of whether or not the restart bit
(0_0.9) is set.
1 = Restart Auto-Negotiation Process
0 = Normal operation
Changes to this bit are disruptive to the normal operation;
therefore, any changes to these registers must be followed by
a software reset to take effect.
A write to this register bit does not take effect until any one of
the following also occurs:
Software reset is asserted (Register 0_0.15)
Restart Auto-Negotiation is asserted (Register 0_0.9)
Power down (Register 0_0.11, 16_0.2) transitions from power
down to normal operation
1 = Full-duplex
0 = Half-duplex
This bit has no effect.
Changes to this bit are disruptive to the normal operation;
therefore, any changes to these registers must be followed by
a software reset to take effect.
A write to this register bit does not take effect until any one of
the following occurs:
Software reset is asserted (Register 0_0.15)
Restart Auto-Negotiation is asserted (Register 0_0.9)
Power down (Register 0_0.11, 16_0.2) transitions from power
down to normal operation
bit 6, 13
11 = Reserved
10 = 1000 Mbps
01 = 100 Mbps
00 = 10 Mbps
Will always be 0.
4.1.2
Copper Status Register - Page 0, Register 1
Bits
Field
15
100BASE-T4
14
Reserved
Mode
HW
Rst
RO
0x0
RO
0x1
SW Rst
Description
100BASE-T4.
0x0
This protocol is not available.
0 = PHY not able to perform 100BASE-T4
0x1
Reserved
66