h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 596
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h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
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Section 15 Controller Area Network (HCAN)
15.3
This LSI device is equipped with 2-channel HCAN modules, which are controlled independently.
Both modules have identical specifications, and they are controlled in the same manner.
15.3.1
The HCAN can be reset by a hardware reset or software reset.
Hardware Reset (HCAN Module Stop, Reset * , Hardware * /Software Standby): Initialization
is performed by automatic setting of the MCR reset request bit (MCR0) in MCR and the reset state
bit (GSR3) in GSR within the HCAN (hardware reset). At the same time, all internal registers are
initialized. However mailbox contents are retained. A flowchart of this reset is shown in figure
15.4.
Note: * In a reset and in hardware standby mode, the module stop bit is initialized to 1 and the
Software Reset (Write to MCR0): In normal operation initialization is performed by setting the
MCR reset request bit (MCR0) in MCR (Software reset). 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 (mailboxes) are not. A flowchart of this reset is shown in
figure 15.5.
Rev. 5.00 Sep 22, 2005 page 570 of 1136
REJ09B0257-0500
HCAN enters the module stop state.
Operation
Hardware and Software Resets
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