SPRUJ17I March 2022 – August 2025 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
The transmitter and receiver cores can be connected together internally to allow for development and debug. This is achieved by setting RX_MAIN_CTRL_ALTC_.INT_LOOPBACK to 1. Internal loopback routes the signals from the corresponding transmitter to the appropriate receiver pin. No configuration needs to be done in the transmitter.
Figure 7-306 shows the signal connections with internal loopback.
Figure 7-306 FSI with Internal Loopback| TX Module | RX Modules |
|---|---|
| FSI0 TX | FSI0 RX |
| FSI1 TX | FSI1 RX |
| FSI2 TX | FSI2 RX |
| FSI3 TX | FSI3 RX |