Applications; Change Port Mode Initialization Sequence; Datasheet - Intel IXF1104 Datasheet

6.0

Applications

6.1

Change Port Mode Initialization Sequence

Use the change port mode initialization sequence after power-up and anytime a port is configured
into or switching between fiber or copper mode, switching to/from RGMII and GMII modes, or
switching speeds and duplex in RGMII mode.
The following sequence applies to all four ports and can be done simultaneously for all ports or as
a subset of the ports.
1. Place the MAC in reset for the port(s) which require a change by asserting (set to 1) the
Soft Reset
2. Place the TX FIFO in reset for the port(s) which require a change by asserting (set to 1) the
"TX FIFO Port Reset
3. Disable the port(s) which require change by de-asserting (set to 0) the appropriate bits in the
"Port Enable
4. Wait 1 μs.
5. De-assert (set to 0)
ports being changed.
6. Set the speed, mode, and duplex as follows for the ports being changed:
a. Copper mode:
Select copper mode for the
Set the per-port
appropriate speed and RGMII/GMII interface setting.
Set the per-port
Note: Half-duplex is supported only when RGMII 10 Mbps or 100 Mbps is selected in the
"MAC IF Mode and RGMII Speed ($ Port_Index +
b. Fiber mode:
Select fiber mode by setting the appropriate bit to 0 in the
ports.
7. Assert (set to 1)
being changed.
8. Wait 1 μs.
9. De-assert (set to 0)
10. De-assert (set to 0)
11. Wait 1 to 2 μs.
12. Set the
a. Copper mode:
Write the reserved bits to the default value.

Datasheet

Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
®
Intel IXF1104 4-Port Gigabit Ethernet Media Access Controller
($0x505)".
($0x620)".
($0x500)".
"Clock and Interface Mode Change Enable Ports 0 - 3 ($0x794)"
"Interface Mode ($0x501)"
"MAC IF Mode and RGMII Speed ($ Port_Index + 0x10)"
"Desired Duplex ($ Port_Index +
"Clock and Interface Mode Change Enable Ports 0 - 3 ($0x794)"
"MAC Soft Reset ($0x505)"
"TX FIFO Port Reset ($0x620)"
"Diverse Config Write ($ Port_Index + 0x18)"
ports.
0x02)".
0x10)".
"Interface Mode ($0x501)"
for the ports being changed.
for the ports being changed.
to the appropriate value as follows:
"MAC
for the
to the
for the ports
130