h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 617
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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)
- Current page: 617 of 1165
- Download datasheet (6Mb)
Section 15 Controller Area Network (HCAN)
HCAN sleep mode is entered by setting the HCAN sleep mode bit (MCR5) to 1 in the master
control register (MCR). If the CAN bus is operating, the transition to HCAN sleep mode is
delayed until the bus becomes idle.
Either of the following methods of clearing HCAN sleep mode can be selected by making a
setting in the MCR7 bit.
1. Clearing by software
2. Clearing by CAN bus operation
Eleven recessive bits must be received after HCAN sleep mode is cleared before CAN bus
communication is enabled again.
Clearing by software: HCAN sleep mode is cleared by writing a 0 to MCR5 from the CPU.
Clearing by CAN bus operation: Clearing by CAN bus operation occurs automatically when the
CAN bus performs an operation and this change is detected. The first message is not received in
the mailbox and normal receiving starts from the next message. When a change is detected on the
CAN bus in HCAN sleep mode, the bus operation interrupt flag (IRR12) is set in the interrupt
register (IRR). If the bus interrupt mask (IMR12) in the interrupt mask register (IMR) is set to the
interrupt enable value at this time, an interrupt can be sent to the CPU.
Rev. 5.00 Sep 22, 2005 page 591 of 1136
REJ09B0257-0500
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