Cyclone® V Hard Processor System Technical Reference Manual

ID 683126
Date 8/28/2023
Public
Document Table of Contents

26.3.5.3. Combined Mode

The CAN controller is set in combined loopback and silent mode by programming the silent mode (Silent) and loopback mode (LBack) bits in the test register (CTR) to 1. Combined mode can be used for testing the CAN hardware without affecting other devices connected to the CAN bus. In this mode, the CAN_RXD pin is disconnected from the CAN core and the CAN_TXD pin is held high.

Figure 139. CAN Core in Combined Mode