Achronix Speedster22i SerDes - Manual (Page 60)

Entry field Purpose Available Options* Choice made
High Freq AGC
AC Boost
Control AC boost of High
frequency AGC
32 options ranging from
0.4 dB to 18.3 dB
Min 0: Boost 0.7dB
Max 31: Boost 22.6dB
7.8 db (default)
DFE Pulse-
shaping Tap 3dB
Freq
3dB Frequency of Pulse-Shaped
Analog
Decision Feedback Equalizer
used to
deal with channel loss
• 105 MHz
• 179 MHz
• 281 MHz
• 391 MHz
• 494 MHz
• 567 MHz
• 663 MHz
• 808 MHz
105 MHz
(default)
DFE Pulse-
shaping Tap
Gain
Tap gain of Pulse-Shaped
Analog
Decision Feedback Equalizer
used to
deal with channel loss
• No pulse shaping tap
• -0.38 dB
• -0.78 dB
• -1.20 dB
• -1.63 dB
• -2.09 dB
• -2.58 dB
• -3.10 dB
No pulse
shaping tap
(default)
DFE N-1 Tap
Gain Control
(mV)
Additional DFE taps to
equalize channel discontinuities
-59.99 mV to +59.99 mV at
8.57 mV interval
0 (default)
DFE N-2 Tap
Gain Control
(mV)
Additional DFE taps to
equalize channel discontinuities
-49.98 mV to +49.98 mV at
7.14 mV interval
0 (default)
DFE N-3 Tap
Gain Control
(mV)
Additional DFE taps to
equalize channel discontinuities
-39.97 mV to +39.97 mV at
5.71 mV interval
0 (default)
DFE N-4 Tap
Gain Control
(mV)
Additional DFE taps to
equalize channel discontinuities
-29.96 mV to +29.96 mV at
4.28 mV interval
0 (default)
RX User Control
From Fabric
• True *1
• False
False (default)
*1 If True is selected, the ACE GUI will add two input ports to the wrapper RTL. This change is
reflected in IP Diagram sub-window by the two additional ports: ch0_i_pma_RXeqlut[32:0] and
ch0_i_pma_RXeqlut_str.
* Available options listed here are the current ones based on characterization data. These values are
subject to change.
RX PMA PLL
This page allows the user to configure the PMA PLL settings on the receive path. The entry
fields and the available options are listed in “Table 14: RX PMA PLL Settings”. This table also
presents the choices that are made for the current design: simple_serdes_design.
60 UG028, July 1, 2014