AN 729: Implementing JESD204B IP Core System Reference Design with Nios II Processor

ID 683844
Date 5/04/2015
Document Table of Contents

1.10.1. Data Rate Reconfiguration

The existing reference design supports dynamic data rate reconfiguration for initially configured serial data rate of 6144 Mbps. At this data rate, you can dynamically reconfigure the data rate to half of the initially configured value (3072 Mbps). However, you are not able to reconfigure to a quarter of the initially configured value even though this is a valid option because the resulting data rate (1536 Mbps) falls below the minimum data rate allowed by the JESD204B IP core and is disallowed by the software. Dynamically reconfiguring the transceiver data rate requires reading in pre-generated configuration files that are specifically generated for a certain transceiver configuration (including the data rate).