DS125DF1610 Datasheet, PDF (55/81 Pages) Texas Instruments – 9.8 to 12.5 Gbps 16-Channel Retimer

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Address
(Hex)
Bits
6B
7
6
5
4
3
2
1
0
6C
7
6
5
4
3
2
1
0
6D
7
6
5
4
3
2
1
0
6E
7
6
5:1
0
DS125DF1610
SNLS482A – APRIL 2014 – REVISED DECEMBER 2015
Default
Value
(Hex)
0
1
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
Table 17. Channel Registers, 5A to 9B (continued)
Mode
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
EEPROM Field Name
Y
FOM_A7
Y
FOM_A6
Y
FOM_A5
Y
FOM_A4
Y
FOM_A3
Y
FOM_A2
Y
FOM_A1
Y
FOM_A0
Y
FOM_B7
Y
FOM_B6
Y
FOM_B5
Y
FOM_B4
Y
FOM_B3
Y
FOM_B2
Y
FOM_B1
Y
FOM_B0
Y
FOM_C7
Y
FOM_C6
Y
FOM_C5
Y
FOM_C4
Y
FOM_C3
Y
FOM_C2
Y
FOM_C1
Y
FOM_C0
Y
EN_NEW_FOM_CTLE
0
RW
Y
EN_NEW_FOM_DFE
0
RW
N
RESERVED
0
RW
N
GET_HV_ST_FRC_EN
Description
Alternate Figure of Merit
variable A
Max value for this register is
128, do not use the MSB
HEO adjustment for Alternate
FoM, variable B
VEO adjustment for alternate
FoM, variable C
1: CTLE adaption state
machine will use the alternate
FoM
HEO_ALT = (HEO-B)*A*2
VEO_ALT = (VEO-C)*(1-A)*2
The values of A,B,C are set
in channel register 0x6B,
0x6C, and 0x6D. The value of
A is equal to the register
value divided by 128
The Alternate FoM = (HEO-
B)*A*2 + (VEO-C)*(1-A)*2
1: DFE adaption state
machine will use the alternate
FoM
HEO_ALT = (HEO-B)*A*2
VEO_ALT = (VEO-C)*(1-A)*2
The values of A,B,C are set
in channel register 0x6B,
0x6C, and 0x6D. The value of
A is equal to the register
value divided by 128
The Alternate FoM = (HEO-
B)*A*2 + (VEO-C)*(1-A)*2
This feature is reserved for
future use.
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