Intel Cyclone 10 GX User Manual

Figure 178. Reverse Serial Loopback Path/Pre CDR
Transmitter
PCS
Serializer
Transmitter
Buffer
Transmitter
PLL
Parallel Data
from FPGA Core
Parallel
Data
Serial
Data
Serial
Clock
Input
Reference
Clock
Transmitter PMA
Clock
Generation
Block
Parallel
Clock
Receiver
PCS
Deserializer
Parallel Data
to FPGA Core
Parallel
Data
Serial
Data
Receiver PMA
CDR
Serial
Data
Receiver
Buffer
Transmitter Serial
Differential Output
Data
Receiver Serial
Differential Input
Data
Serial Clock
Parallel Clock
Diagnostic
Loopback
Note: TX pre-emp is not supported in pre-CDR loopback. TX pre-emp is recommended to set to zero for all taps.
Figure 179. Reverse Serial Loopback Path/Post CDR
The reverse serial loopback path sets the transmitter buffer to transmit data fed directly from the CDR
recovered data. Data from the serializer is ignored by the transmitter buffer.
Transmitter
Buffer
Serial
Data
Transmitter Serial
Differential Output
Data
Transmitter PMA
Receiver
PCS
Deserializer
Parallel Data
to FPGA core
Parallel
Data
Serial
Data
Receiver PMA
CDR
Serial
Data
Receiver
Buffer
Transmitter
PCS
Serializer
Transmitter
PLL
Parallel Data
Parallel
Data
Serial
Clock
Input
Reference
Clock
Clock
Generation
Block
Parallel
Clock
Receiver Serial
Differential Input
Data
Reverse
Loopback
Serial Clock
Parallel Clock
from FPGA core
5.2. Cyclone 10 GX Enhanced PCS Architecture
You can use the Enhanced PCS to implement multiple protocols that operate at around
10 Gbps or higher line rates.
The Enhanced PCS provides the following functions:
• Performs functions common to most serial data industry standards, such as word
alignment, block synchronization, encoding/decoding, and framing, before data is
sent or received off-chip through the PMA
• Handles data transfer to and from the FPGA fabric
• Internally handles data transfer to and from the PMA
• Provides frequency compensation
• Performs channel bonding for multi-channel low skew applications
5. Cyclone 10 GX Transceiver PHY Architecture
UG-20070 | 2018.09.24
Send Feedback
Intel
®
Cyclone
®
10 GX Transceiver PHY User Guide
283

Intel Cyclone 10 GX Specifications

General

Brand	Intel
Model	Cyclone 10 GX
Category	Transceiver
Language	English