SH7052 datasheet(559/919 Pages) RENESAS

tên linh kiện	SH7052

Giải thích chi tiết về linh kiện	SuperHTM RISC engine

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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.

SH7052 bảng dữ liệu(PDF) 559 Page - Renesas Technology Corp