Arria® V Device Handbook: Volume 2: Transceivers

ID 683573
Date 5/29/2020
Document Table of Contents

8.7. Transceiver Channel Reconfiguration

You can use channel reconfiguration to dynamically reconfigure the channel in a transceiver PHY IP core. Among the settings that you can change dynamically are the data rate and interface width.

You can reconfigure the channels in the following ways:

  • Reconfigure the CDR of the receiver channel.
  • Enable and disable all static PCS sub-blocks.
  • Select an alternate PLL within the transceiver block to supply a different clock to the transceiver clock generation block.
  • Reconfigure the TX local clock divider with a 1, 2, 4, or 8 division factor.

Every transmitter channel has a clock divider. When you reconfigure these clock dividers, ensure that the functional mode of the transceiver channel supports the reconfigured data rate. For example, you can change the data rate from 6.25 Gbps to 3.125 Gbps by reconfiguring the clock divider.