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13
CAN MODULE
13-31
32185/32186 Group Hardware Manual
Rev.1.10 REJ09B0235-0110 May 15, 07
(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."
However, it takes one bit period worth of set baud rate until CRS bit is cleared (=0) after RST bit and
FRST bit are cleared (=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 lower 4 bits of the relevant slot number when the CAN module has finished sending or
finished storing the received data.
Slots 0 to 15 and 16 to 31 have the same value. When only slots 0 to 15 or slots 16 to 31 are used, these bits
can be read out simultaneously with other status bits. In the case where all slots are used, refer to "CANn
Message Slot Number Register (CANnMSN)."
These bits cannot be cleared to "0" in software.
Note: When CAN module receives the frame that is transmitted by the CAN module itself during
loopback mode, the MSN bits indicate the transmit slot number.
13.2 CAN Module Related Registers