M32C83T datasheet(355/527 Pages) RENESAS

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Page 332

22. CAN Module

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22.1.4.3 RECSUCC Bit

The RECSUCC bit is set to "1" when the CAN module has received data as expected. (Whether

received message has been stored in the message slot or not is irrelevant.) If the received message

is transmitted in loopback mode, the TRMSUCC bit is set to "1" and the RECSUCC bit is set to "0".

The RECSUCC bit is set to "0" when the CAN module has transmitted data as expected.

22.1.4.4 TRMSTATE Bit

The TRMSTATE bit is set to "1" when the CAN module is performing as a transmit node.

The TRMSTATE bit is set to "0" when the CAN module is in a bus-idle state or starts performing as

a receive node.

22.1.4.5 RECSTATE Bit

The RECSTATE bit is set to "1" when the CAN module is performing as a receive node.

The RECSTATE bit is set to "0" when the CAN module is in a bus-idle state or starts performing as

a transmit node.

22.1.4.6 STATE_RESET Bit

After both RESET0 and RESET1 bits are set to "1" (CAN module reset), the STATE_RESET bit is

set to "1" as soon as the CAN module is reset.

The STATE_RESET bit is set to "0" when the RESET0 and RESET1 bits are set to "0".

22.1.4.7 STATE_LOOPBACK Bit

The STATE_ LOOPBACK bit is set to "1" when the CAN module is in loopback mode.

The STATE_LOOPBACK bit is set to "1" when the LOOPBACK bit in the C0CTLR0 register is set to "1"

(loop back function enabled).

The STATE_LOOPBACK bit is set to "0" when the LOOPBACK bit is set to "0" (loop back function

disabled).

22.1.4.8 STATE_BASICCAN Bit

The STATE_BASICCAN bit is set to "1" when the CAN module is in BasicCAN mode.

Refer to 22.1.1.3 BASICCAN Bit for BasicCAN mode.

The STATE_BASICCAN bit is set to "0" when the BASICCAN bit is set to "0" (BasicCAN mode

function disabled).

The STATE_BASICCAN bit is set to "1" when the BASICCAN bit is set to "1" (BasicCAN mode

function enabled), the REMACTIVE bits in the C0MCTL14 and C0MCTL15 registers in the message

slot 14 and 15 are set to "0" (data frame received) and the RECREQ bit is set to "1" (request to

receive the frame).

22.1.4.9 STATE_BUSERROR Bit

The STATE_BUSERROR bit is set to "1" when an CAN communication error is detected.

The STATE_BUSERROR bit is set to "0" when the CAN module has transmitted or received data as

expected. Whether a received message has been stored into the message slot or not is irrelevant.

NOTES:

1. When the STATE_BUSERROR bit is set to "1", the STATE_BUSERROR bit remains un-

changed even if both RESET 0 and RESET1 bits are set to "1" (CAN module reset).

22.1.4.10 STATE_ERRPAS Bit

The STATE_ERRPAS bit is set to "1" when the value of the C0TEC or C0REC register exceeds 127

and places the CAN module in an error-passive state.

The STATE_ERRPAS bit is set to "0" when the CAN module in an error passive state is placed in

another error state.

The STATE_ERRPAS bit is set to "0" when both RESET0 and RESET1 bits are set to "1" (CAN

module is reset).

22.1.4.11 STATE_BUSOFF Bit

The STATE_BUSOFF bit is set to "1" when the value of the C0TEC register exceeds 255 and the

CAN module in a bus-off state.

The STATE_BUSOFF bit is set to "0" when the CAN module in a bus-off state is placed in an error-

active state.

The STATE_BUSOFF bit is set to "0" when both RESET0 and RESET1 bits are set to "1" (CAN

module reset).

M32C83T Datasheet(PDF) 355 Page - Renesas Technology Corp

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