Renesas M32R/ECU Series, User Manual

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13
13-20
32180 Group User’s Manual (Rev.1.0)
CAN MODULE
13.2 CAN Module Related Registers
(6) CRS (CAN Reset Status) bit (Bit 7)
When CRS bit = "1", it means that the protocol control unit is in a reset state.
[Set condition]
This bit is set to "1" when the CAN protocol control unit is in a reset state.
[Clear condition]
This bit is cleared by clearing the CAN Control Register RST (CAN reset) and FRST bits to "0".
(7) RSB (Receive Status) bit (Bit 8)
[Set condition]
This bit is set to "1" when the CAN module is operating as a receive node.
[Clear condition]
This bit is cleared when the CAN module starts operating as a transmit node or enters a bus idle state.
(8) TSB (Transmit Status) bit (Bit 9)
[Set condition]
This bit is set to "1" when the CAN module is operating as a transmit node.
[Clear condition]
This bit is cleared when the CAN module starts operating as a receive node or enters a bus idle state.
(9) RSC (Reception Completed Status) bit (Bit 10)
[Set condition]
This bit is set to "1" when the CAN module has finished receiving normally (regardless of whether there
is any slot that meets receive conditions).
[Clear condition]
This bit is cleared when the CAN module has finished sending normally.
(10) TSC (Transmission Completed Status) bit (Bit 11)
[Set condition]
This bit is set to "1" when the CAN module has finished sending normally.
[Clear condition]
This bit is cleared when the CAN module has finished receiving normally.
(11) MSN (Message Slot Number) bits (Bits 12–15)
These bits indicate the relevant slot number when the CAN module has finished sending or finished storing
the received data. These bits cannot be cleared to "0" in software.
Note: • When during loopback mode a frame is received that the CAN module itself transmitted, the
MSN bits indicate the transmit slot number.