BAT32G1x9 user manual | Chapter 22 CAN control
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Rev.1.02
22.13.3
Self-test mode
In self-test mode, packet frame transmission and reception can be tested without connecting the CAN
node to the CAN bus without affecting the CAN bus.
In self-test mode, the CAN module is completely disconnected from the CAN bus, but the transmission
and reception loop internally. The CAN transmit pin (CTxD) is fixed to the recessive level.
If the upper descending edge of the CAN receive pin (CRxD) is detected after the CAN module enters
CAN sleep mode from self-test mode, the module is released from CAN sleep mode in the same way as
other modes of operation. (However, to release the CAN sleep mode, the PSMODE0 bit needs to be cleared
by software after the falling edge on the CAN receive pin (CRxD) is detected in the state where the CAN
clock is provided.) To keep the module in CAN sleep mode, the CAN receive pin (CRxD) needs to be used
as the port pin.
Figure 22-58. Can module terminal connection in self-test mode
LikeNmacro
Tx
Rx
Fixed to the
recessive
level
CTxD
CRxD