Can Core In External Loopback Mode; Can Core In Loopback Combined With Silent Mode - Texas Instruments Concerto F28M35 Series Technical Reference Manual

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23.2.3.4 Loopback Combined with Silent Mode
It is also possible to combine loopback mode and silent mode by setting the LBack bit and Silent bit at the
same time. This mode can be used for a "Hot Selftest", that is, the CAN hardware can be tested without
affecting the CAN network. In this mode, the CAN_RX pin is disconnected from the CAN core and no
dominant bits will be sent on the CAN_TX pin.
Figure 23-6 shows the connection of the signals CAN_TX and CAN_RX to the CAN Core in case of the
combination of loopback mode with silent mode.
Figure 23-6. CAN Core in Loopback Combined with Silent Mode
SPRUH22I – April 2012 – Revised November 2019
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Figure 23-5. CAN Core in External Loopback Mode
CAN_TX
pin
DCAN
Rx
CAN Core
CAN_TX
DCAN
=1
•
Tx
CAN Core
Copyright © 2012–2019, Texas Instruments Incorporated
CAN_RX
pin
Tx
CAN_RX
•
Rx
M3 Controller Area Network (CAN)
Operating Modes
1519