Achronix Speedster22i SerDes - Manual (Page 62)

TX PMA Driver
This page allows the user to configure the transmit driver settings on PMA.. The entry fields
and the available options are listed in “Table 15: TX PMA Driver Settings”. This table also
presents the choices that are made for the current design: simple_serdes_design.
Table 15: TX PMA Driver Settings
Entry field Purpose Available Options Choice made
Transmit Amplitude
(mVdiff-pkpk)
Transmit Amplitude control
signal. Used to define the
full-scale maximum swing of
the driver.
• 952
• 1024
• 1094
• 1163
• 1227
• 1283
• 1331
1331 (Default)
Cursor Level N
Defines the total number of
driver units allocated in the
driver
Text field to enter any
value
21 (Default)
Per-Cursor Level N+1
Defines the total number of
driver units allocated to the
first pre-cursor (C-1) tap.
Text field to enter any
value
0 (Default)
Post-Cursor Level N-1
Defines the total number of
driver units allocated to the
first pre-cursor (C+1) tap.
Text field to enter any
value
4 (Default)
Post-Cursor Level N-2
Defines the total number of
driver units allocated to the
second post-cursor (C+2) tap.
Text field to enter any
value
0 (Default)
Slew Rate TX driver Slew Rate control
• 31 ps
• 33 ps
• 68 ps
• 170 ps
31 ps (Default)
TX User Control from
Fabric
• True
• False
False (Default)
This page also lists additional TX PMA driver related information (to facilitate user-choices):
• Maximum Bit Amplitude (mVpp):
1173
• Back-Porch Bit Amplitude (mVpp): 861
• Preshoot Level (dB): 0.00
• De-emphasis Level (dB): -2.69
TX PMA PLL
This page allows the user to configure the PMA PLL settings on the transmit path. There is
one entry field in this page for simple_serdes_design, as listed in “Table 16: TX PMA PLL
Settings”:
62 UG028, July 1, 2014