User guide

Arria 10 transceivers support the following two CTLE modes:
• High gain mode
• High data rate mode.
High gain mode is enabled by default for data rates up to 17.4 Gbps. High data rate mode is enabled for
data rates higher than 17.4 Gbps.
When the RX link is specified as Short Reach (SR), the default value is STG2_GAIN7. For Long Reach
(LR), the default is STG1_GAIN7.
Note: STGx_GAIN7 is the only valid setting at this time.
Table 8-6: Available Options
Value in TTK Value in Assignment Editor / qsf Description
DC Gain 0
NO_DC_GAIN No DC gain
DC Gain 1
STG1_GAIN<1 to 7> Equalizer DC gain setting <0 to 6>
DC Gain 2
STG2_GAIN<1 to 7> Equalizer DC gain setting <7 to 13>
DC Gain 3
STG3_GAIN<1 to 7> Equalizer DC gain setting <14 to 20>
DC Gain 4
STG4_GAIN<1 to 7> Equalizer DC gain setting <21 to 27>
Assign To
RX serial data.
Syntax
set_instance_assignment -name XCVR_A10_RX_EQ_DC_GAIN_TRIM <value> -to <rx_serial_data
pin name>
XCVR_A10_RX_ADP_CTLE_ACGAIN_4S
Pin planner or Assignment Editor Name
Receiver High Gain Mode Equalizer AC Gain Control
Description
Controls the AC gain of the continuous time linear equalizer (CTLE) in high gain mode.
Arria 10 transceivers support two CTLE modes, high gain mode and high data rate mode. High gain
mode is enabled by default for data rates up to 17.4 Gbps. High data rate mode is enabled for data rates
higher than 17.4 Gbps.
This assignment is available only when CTLE is in manual mode (adaptation is disabled). Higher gain
setting results in larger AC gain. The default value is set to RADP_CTLE_ACGAIN_4S_1 for CTLE AC
gain setting 1.
UG-01143
2015.05.11
XCVR_A10_RX_ADP_CTLE_ACGAIN_4S
8-7
Analog Parameter Settings
Altera Corporation
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