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ST72561J4-Auto 데이터시트(PDF) 218 Page - STMicroelectronics |
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ST72561J4-Auto 데이터시트(HTML) 218 Page - STMicroelectronics |
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218 / 324 page ![]() beCAN controller (beCAN) ST72561-Auto 218/324 Doc ID 12370 Rev 8 Figure 95. CAN block diagram Figure 96. beCAN operating modes 17.3 Operating modes The beCAN has three main operating modes: Initialization, Normal and Sleep. After a hardware reset, beCAN is in Sleep mode to reduce power consumption. The software requests beCAN to enter Initialization or Sleep mode by setting the INRQ or SLEEP bits in the CMCR register. Once the mode has been entered, beCAN confirms it by setting the INAK or SLAK bits in the CMSR register. When neither INAK nor SLAK are set, beCAN is in 1 4 5 CAN 2.0B Active Core Mailbox 0 Transmission Filter 1 2 3 Mailbox 1 Mailbox 0 1 2 Receive FIFO Acceptance Filters Tx Mailboxes Master Control Scheduler Master Status Transmit Status Transmit Prio Receive FIFO Error Status Error Int. Enable Tx Error Counter Rx Error Counter Diagnostic Bit Timing Filter Master Filter Config. Page Select Interrupt Enable 0 SLEEP SYNC INITIALIZATION NORMAL SL EE P * INR Q INR Q INRQ RESET SLAK= 1 INAK = 0 SLAK= X INAK = X SLAK= 0 INAK = 1 SLE EP SLE EP SLAK= 0 INAK = 0 INRQ |
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