DS125DF1610 Datasheet, PDF (40/81 Pages) Texas Instruments – 9.8 to 12.5 Gbps 16-Channel Retimer

DS125DF1610
SNLS482A – APRIL 2014 – REVISED DECEMBER 2015
Address
(Hex)
Bits
28
7
6
5
4
3
2
1
0
29
7
6
5
Table 15. Channel Registers, 20 to 39 (continued)
Default
Value
(Hex)
0
0
0
0
0
0
0
0
0
0
0
Mode
R
R
R
R
R
R
R
R
RW
R
R
EEPROM
Field Name
N
VEO7
N
VEO6
N
VEO5
N
VEO4
N
VEO3
N
VEO2
N
VEO1
N
VEO0
N
RESERVED
N
EOM_VRANGE_SETTING1
N
EOM_VRANGE_SETTING0
4
0
RW
N
EN_FOM_RESET
3
0
RW
N
VEO_MIN_HITS_1
2
0
RW
N
VEO_MIN_HITS_0
1:0
0
RW
N
RESERVED
2A
7
0
RW
Y
EOM_TIMER_THR7
6
0
RW
Y
EOM_TIMER_THR6
5
1
RW
Y
EOM_TIMER_THR5
4
1
RW
Y
EOM_TIMER_THR4
3
0
RW
Y
EOM_TIMER_THR3
2
0
RW
Y
EOM_TIMER_THR2
1
0
RW
Y
EOM_TIMER_THR1
0
0
RW
Y
EOM_TIMER_THR0
2B
7:6
0
RW
N
RESERVED
5:4
0
RW
Y
RESERVED
3
1
RW
Y
EOM_MIN_REQ_HITS3
2
1
RW
Y
EOM_MIN_REQ_HITS2
1
1
RW
Y
EOM_MIN_REQ_HITS1
0
1
RW
Y
EOM_MIN_REQ_HITS0
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Description
VEO value, requires CDR to
be locked for valid
measurement
Use these bits to read back
the EOM voltage range
setting
00: ±100 mV
01: ±200 mV
10: ±300 mV
11: ±400 mV
1: Enables resetting the FOM
before issuing a manual
adaption
These bits set the number of
hits for a particular phase
and voltage location in the
EOM before the EOM will
indicate a hit has occured.
This filtering only affects the
VEO measurement.
Filter thresholds:
00: 0 hits
01: 15 hits
10, 11: 255 hits
Controls the amount of time
the EOM samples each point
in the eye for. The total
counter bit width is 16-bits,
this register is the upper 8-
bits. The counter counts in
32-bit words, therefore, the
total number of bits counted
is 32 times this value.
These bits set the number of
hits for a particular phase
and voltage location in the
EOM before the EOM will
indicate a hit has occured.
This filtering only affects the
HEO measurement.
Filter threshold ranges from
0 to 15 hits.
40
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