CEI 224G-MR Compliance Kit
CEI 224G-MR is a common electrical interface (CEI) implementation agreement that supports 224 Gb/s over "Medium Reach" (MR) electrical chip-to-chip applications. The CEI-224G-MR clause is a part of the Common Electrical I/O Implementation Agreement. The CEI 224G-MR interface relies on PAM4 modulation to increase the bandwidth in MR channels. The PAM4 modulation can transmit 4-symbols per UI instead of 2-symbols per UI that the NRZ modulation transmits.
The CEI 224G-MR is designed for analysis of a Chip-to-Chip board channel. The MR channel consists of a board, an optional mated connector, and a mated board. This represents the connection between the transmitting and receiving data across the channel. Network characterization is set up for insertion and return loss testing to the compliance masks, and channel FEXT/NEXT crosstalk is included in multi-channel sheets to measure the effects on BER. An example spreadsheet is included for running a Channel Operating Margin (COM) analysis.
This CEI 224G-MR enables you to insert a channel design and characterize and validate its performance using the specification masks to determine if the channel has a high confidence of success. If the channel does not meet the compliance masks, COM, or BER estimates, you can further investigate the channel performance or redesign the channel, keeping in mind that not all compliance metrics can be simulated and need to be measured in a laboratory environment.
Open CEI 224G-MR Kit
Open the CEI 224G-MR kit in the Serial Link Designer app using the openSignalIntegrityKit function.
openSignalIntegrityKit("CEI_224G_MR");
Kit Overview
Project Name: CEI_224G_MR
Interface Name: CEI_224G_MR
The CEI 224G-MR kit defines multiple schematic sets. Schematic sheets are included for testing a CEI 224G-MR channel. The masks provided in this kit are based on the OIF CEI 224G-MR specifications [1].
Channel_Chip_to_Chip_BER_Compliance – All compliance host-to-module or module-to-host simulations for insertion loss
Channel_Xtalk_Chip_to_Chip_FEXT – All compliance host-to-module or module-to-host simulations for Far-End Crosstalk
Channel_Xtalk_Chip_to_Chip_NEXT – All compliance host-to-module or module-to-host simulations for Near-End Crosstalk
For more information about the CEI 224G-MR channel compliance schematics, transfer net properties, and compliance rules, refer to CEI_224G_MR.pdf which is located with the other kit files.
References
[1] OIF CEI-224G-MR Specification (Draft from Implementation Agreement OIF-CEI-6.0, https://www.oiforum.com/)
