Can_Muxing; Can Core In Silent Mode - Texas Instruments Concerto F28M35 Series Technical Reference Manual

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For all test modes, the Test bit in the CAN Control register needs to be set to 1 to enable write access to

the Test register (see

23.2.3.1 Silent Mode

The silent mode may be used to analyze the traffic on the CAN bus without affecting it by sending

dominant bits (for example, acknowledge bit, overload flag, active error flag). The CAN is still able to

receive valid data frames and valid remote frames, but it will not send any dominant bits. However, the

received frames are internally routed to the CAN core.

shows the connection of signals CAN_TX and CAN_RX to the CAN core in silent mode. Silent

mode can be activated by setting the Silent bit in test register (CAN_TEST) to 1. In ISO 11898-1, the silent

mode is called the bus monitoring mode.

SPRUH22I – April 2012 – Revised November 2019

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Figure 23-2. CAN_MUXing

Figure 23-3. CAN Core in Silent Mode

CAN_TX CAN_RX

M3 Controller Area Network (CAN)

Operating Modes

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