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IXF1104 4-Port Gigabit Ethernet Media Access Controller
Datasheet 220
Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
8.4.10 SerDes Register Overview
Table 149 through Table 152 “Clock and Interface Mode Change Enable Ports 0 - 3 ($0x794)” on
page 221 define the contents of the SerDes registers at base location 0x780, which contain the
control and status for the four SerDes interfaces on the IXF1104 MAC.
Table 149. TX Driver Power Level Ports 0 - 3 ($0x784)
Bit Name Description Type Default
Register Description:
Allows selection of various programmable drive strengths on each
SerDes port. Refer to Section 5.6.2.2, “Transmitter Programmable Driver-Power Levels” on
page 104.
0x0000dddd
31:16 Reserved Reserved RO 0x0000
15:12 DRVPWR3[3:0] Encoded input that sets Power Level for Port 3 R/W 1101
11:8 DRVPWR2[3:0] Encoded input that sets Power Level for Port 2 R/W 1101
7:4 DRVPWR1[3:0] Encoded input that sets Power Level for Port 1 R/W 1101
3:0 DRVPWR0[3:0] Encoded input that sets Power Level for Port 0 R/W 1101
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 150. TX and RX Power-Down ($0x787)
Bit Name Description Type Default
Register Description:
TX and RX power-down bits to allow per-port power-down of unused
ports
0x00000000
31:14 Reserved Reserved RO 0x0000000
13:10 TPWRDWN[3:0] TX power-down for Ports 3-0 (1 = Power-down) R/W 0000
9:4 Reserved Reserved RO 0x00
3:0 RPWRDWN[3:0] RX Power-down for Ports 3-0 (1 = Power-down) R/W 0000
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 151. RX Signal Detect Level Ports 0 - 3 ($0x793)
Bit Name Description Type
1
Default
Register Description:
This register shows the status of the Rx input in relation to the level of
the signal being received from the line. This register is meant for debug and test use.
0x00000000
31:4 Reserved Reserved RO 0x0000000
3:0 SIGDET[3:0]
Signal Detect for Ports 0-3
0 = Noise
1 = Signal
RO 0x0
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