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©2008 Advanced Micro Devices, Inc.
SATA Registers (Device 18, Function 0)
AMD SB600 Register Reference Manual Proprietary Page 22
PHY Port1 Control - RW- 32 bits - [PCI_Reg:8Ch]
Field Name Bits Default Description
TX pre-emphasis driver
swing
7:5 000b Port1 Tx driving swing[7:5] is valid for both SATA 3G and
1.5G. It sets the TX pre-emphasis driver strength. The user
can program the optimum pre-emphasis value for each SATA
port if TX pre-emphasis enable bit turned on.
Bit 7 Bit 6 Bit 5 pre-emphasis amount
0 0 0 0mv
0 0 1 25mv
0 1 0 50mv
0 1 1 75mv
1 0 0 100mv
1 0 1 125mv
1 1 0 150mv
1 1 1 175mv
Note: This applies to all the ASIC Revisions A11 and above.
TX pre-emphasis enable 13 0b Turns on port1 TX pre-emphasis output.
1: Enable pre-emphasis
0: Disable pre-emphasis
PHY Port2 Control - RW- 32 bits - [PCI_Reg:90h]
Field Name Bits Default Description
Port2 PHY 23:0 B40014h PHY port2 fine-tune register.
TX main swing 4:0 10100b Port2 Tx driving swing[4:0] is valid at SATA 1.5G.
Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Nominal Output
1 0 0 0 0 400mv
1 0 0 1 0 450mv
1 0 1 0 0 500mv
1 0 1 1 0 550mv
1 1 0 0 0 600mv
1 1 0 1 0 650mv
1 1 1 0 0 700mv
1 1 1 1 0 750mv
Note: This applies to all the ASIC Revisions A11 and above.
TX pre-emphasis driver
swing
7:5 000b Port2 Tx driving swing[7:5] is valid for both SATA 3G and
1.5G. It sets the TX pre-emphasis driver strength. The user
can program the optimum pre-emphasis value for each SATA
port if TX pre-emphasis enable bit turned on.
Bit 7 Bit 6 Bit 5 pre-emphasis amount
0 0 0 0mv
0 0 1 25mv
0 1 0 50mv
0 1 1 75mv
1 0 0 100mv
1 0 1 125mv
1 1 0 150mv
1 1 1 175mv
Note: This applies to all the ASIC Revisions A11 and above.
TX pre-emphasis enable 13 0b Turns on port2 TX pre-emphasis output
1: Enable pre-emphasis
0: Disable pre-emphasis