GX3146 Datasheet, PDF (22/46 Pages) Semtech Corporation – Crosspoint Switch with Trace Equalization and Output De-emphasis

Each output can be independently powered-down by the setting of the corresponding
bit: ACTIVE_POWER_DOWN[287:0], DYNAMIC_POWER_DOWN[287:0] together
with the assigned strobe, MON0_POWER_DOWN, or MON1_POWER_DOWN.
The polarity of the signal at each output can be independently inverted by setting the
corresponding bit: ACTIVE_SIGNAL_INVERT[287:0],
DYNAMIC_SIGNAL_INVERT[287:0] together with the assigned strobe,
MON0_SIGNAL_INVERT, or MON1_SIGNAL_INVERT.
Table 4-3: Serial Data Output
OUTPUT_SWING_SET[287:0],
MON0_OUTPUT_SWING_SET and
MON1_OUTPUT_SWING_SET bits 2:0 (binary)
000
001
011
110
111
OUTPUT_DEEMPHASIS[287:0],
MON0_OUTPUT_DEEMPHASIS and
MON1_OUTPUT_DEEMPHASIS bits 5:3 (binary)
000
100
101
110
111
ACTIVE_SIGNAL_INVERT[287:0],
DYNAMIC_SIGNAL_INVERT[287:0],
MON0_SIGNAL_INVERT or MON1_SIGNAL_INVERT
0
1
ACTIVE_POWER_DOWN[287:0],
DYNAMIC_POWER_DOWN[287:0],
MON0_POWER_DOWN or MON1_POWER_DOWN
0
1
Output Swing
200mVppd
400mVppd
800mVppd
1200mVppd
Reserved. Do not use.
Level of De-emphasis
Off
12” (30 cm) nominal
24” (60 cm) nominal
36” (90 cm) nominal
48” (120 cm) nominal
Status
Not inverted
Inverted
Status
On
Off
GX3146 146 x 146 3.5Gb/s Crosspoint
Final Data Sheet Rev. 2
GENDOC-056075 March 2013
www.semtech.com
22 of 46
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