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SH7052 Datasheet(PDF) 559 Page - Renesas Technology Corp |
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SH7052 Datasheet(HTML) 559 Page - Renesas Technology Corp |
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559 / 919 page  533 15.3 Operation 15.3.1 Hardware Reset and Software Reset There are two ways of resetting the HCAN: Hardware reset, software reset Hardware Reset (power-on reset or hardware/software standby): The MCR reset request bit (MCR0) in MCR and the reset state bit (GSR3) in GSR within the HCAN are automatically set and initialization is performed. At the same time, all internal registers are initialized. However mailbox (RAM) contents are not initialized. A flowchart of this reset is shown in figure 15.5. Software Reset: In normal operation, HCAN is initialized by setting the MCR reset request bit (MCR0) in MCR. With this kind of reset, if the CAN controller is performing a communication operation (transmission or reception), the initialization state is not entered until the message has been completed. During initialization, the reset state bit (GSR3) in GSR is set. In this kind of initialization, the error counters (TEC and REC) are initialized but other registers and RAM are not. A flowchart of this reset is shown in figure 15.6. |
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