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IXF1104 4-Port Gigabit Ethernet Media Access Controller
Datasheet 187
Document Number: 278757
Revision Number: 007
Revision Date: March 25, 2004
8.4.5 Global Status and Configuration Register Overview
Table 103 through Table 112 “JTAG ID ($0x50C)” on page 191 provide an overview for the Global
Control and Status Registers.
Table 103. Port Enable ($0x500)
Bit Name Description Type
*
Default
Register Description:
A control register for each port in the IXF1104. Port ID = bit position in
the register. To make a port active, the bit must be set High. For example, Port 2 active implies
a register value of 0000.0100. Setting the bit to 0 de-asserts the enable. The default state for
this register is for all four ports to be disabled.
0x00000000
31:4 Reserved Reserved RO 0x0000000
3 Port 3 Enable
Port 3
0 = Disable
1 = Enable
R/W 0
2 Port 2 Enable
Port 2
0 = Disable
1 = Enable
R/W 0
1 Port 1 Enable
Port 1
0 = Disable
1 = Enable
R/W 0
0 Port 0 Enable
Port 0
0 = Disable
1 = Enable
R/W 0
1. RO = Read Only, No clear on Read; R = Read, Clear on Read; W = Write only; R/W = Read/Write, No
clear; R/W/C = Read/Write, Clear on Write
Table 104. Interface Mode ($0x501)
Bit Name Description Type
1
Default
Register Description:
If_Mode – Four bits of this register determines the PHY interface
mode.
0 = Fiber (SerDes/OMI interface)
1 = Copper (GMII or RGMII interface)
Changes to the data setting of this register must be made in conjunction with the “Clock and
Interface Mode Change Enable Ports 0 - 3 ($0x794)" to ensure a safe transition to a new
operational mode (see Section 6.1, “Change Port Mode Initialization Sequence” on page 129).
The Enable clock mode change bit has to be set back to 1 after the configuration change takes
effect.
0x00000000
31:4 Reserved Reserved RO 0x0000000
3 Port 3 Interface Mode
0 = Fiber mode
1 = Copper mode
R/W 0
2 Port 2 Interface Mode
0 = Fiber mode
1 = Copper mode
R/W 0
1 Port 1 Interface Mode
0 = Fiber mode
1 = Copper mode
R/W 0
0 Port 0 Interface Mode
0 = Fiber mode
1 = Copper mode
R/W 0
1. RO = Read Only, No clear on Read; R = Read, Clear on Read; W = Write only; R/W = Read/Write, No
clear; R/W/C = Read/Write, Clear on Write