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SH7052 Scheda tecnica(PDF) 559 Page - Renesas Technology Corp

Il numero della parte SH7052
Spiegazioni elettronici  SuperHTM RISC engine
PDF  919 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7052 Scheda tecnica(HTML) 559 Page - Renesas Technology Corp

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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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