User guide

a. For CTLE and DFE in Manual mode, set the CTLE gain value or DFE Taps using the reconfigura‐
tion interface. The values are written dynamically and do not require design re-compilation.
Refer to Arria 10 Register Map for details on the specific registers that set the CTLE gain
values/DFE taps.
b. For dynamically changing CTLE or DFE Adaptation mode, refer to the Arria 10 Register Map and
Arria 10 Adaptation Tool for the list of adaptation registers.
Note: VGA mode is automatically selected based on what you set CTLE/DFE modes. For example, if
you select CTLE as Triggered, the adaptation engine sets VGA also in Triggered mode. Similarly
if you set CTLE in Manual, the adaptation engine sets VGA in manual as well. To configure
CTLE and VGA in Manual mode, refer to Arria 10 Register Map for additional details.
Related Information
Arria 10 Register Map
Arria 10 Adaptation Tool is a separate tab in the Arria10 Register Map.
On-Die Instrumentation (ODI)
On-Die Instrumentation (ODI) provides on-chip eye monitoring capabilities (EyeQ).
This capability helps to both optimize link equalization parameters during board bring-up and provide in-
system link diagnostics.
Figure 5-11: Receiver and ODI Architecture
CTLE
Receiver
Input
DFE CDR
Deserializer
To PCS/FPGA Fabric
Avalon-MM Interface
Logic
Vref
Generator
ODI
Sampler
Phase
Interpolator
Deserializer
Deserializer
Bit Error
Ratio
Checker
To Avalon-MM Interface
ODI
ODI in Arria 10 transceivers uses a phase interpolator to generate a horizontal offset and the voltage
reference (Vref) generator to generate a vertical offset to get the ODI sample. By comparing the bit
difference between the CDR sample and the ODI sample in the bit error ratio checker, ODI can monitor
link margin over live traffic.
ODI in Arria 10 transceivers provides 64 horizontal steps and 127 (0 and +/– 63) vertical steps to monitor
eye margin. You can set both horizontal and vertical steps through the Avalon-MM registers.
UG-01143
2015.05.11
On-Die Instrumentation (ODI)
5-13
Arria 10 Transceiver PHY Architecture
Altera Corporation
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