SH7205 Datasheet, PDF (1036/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 20 Controller Area Network (RCAN-TL1)
• Halt mode
When RCAN-TL1 is in Halt mode, it cannot take part to the CAN bus activity. Consequently the
user can modify all the requested registers without influencing existing traffic on the CAN Bus. It
is important for this that the user waits for the RCAN-TL1 to be in halt mode before to modify the
requested registers - note that the transition to Halt Mode is not always immediate (transition will
occurs when the CAN Bus is idle or in intermission). After RCAN-TL1 transit to Halt Mode,
GSR4 is set.
Once the configuration is completed the Halt request needs to be released. RCAN-TL1 will join
CAN Bus activity after the detection of 11 recessive bits on the CAN Bus.
• Sleep mode
When RCAN-TL1 is in sleep mode the clock for the main blocks of the IP is stopped in order to
reduce power consumption. Only the following user registers are clocked and can be accessed:
MCR, GSR, IRR and IMR. Interrupt related to transmission (TXACK and ABACK) and reception
(RXPR and RFPR) cannot be cleared when in sleep mode (as TXACK, ABACK, RXPR and
RFPR are not accessible) and must to be cleared beforehand.
Rev. 1.00 Mar. 25, 2008 Page 1004 of 1868
REJ09B0372-0100