Datasheet

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MCP2515

7.6.2 RECEIVER WARNING

The REC has reached the MCU warning limit of 96.

7.6.3 TRANSMITTER WARNING

The TEC has reached the MCU warning limit of 96.

7.6.4 RECEIVER ERROR-PASSIVE

The REC has exceeded the error-passive limit of 127

and the device has gone to error-passive state.

7.6.5 TRANSMITTER ERROR-PASSIVE

The TEC has exceeded the error- passive limit of 127

and the device has gone to error- passive state.

7.6.6 BUS-OFF

The TEC has exceeded 255 and the device has gone

to bus-off state.

7.7 Interrupt Acknowledge

Interrupts are directly associated with one or more sta-

tus flags in the CANINTF register. Interrupts are pend-

ing as long as one of the flags is set. Once an interrupt

flag is set by the device, the flag can not be reset by the

MCU until the interrupt condition is removed.

(ADDRESS: 2Bh)

R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0

MERRE WAKIE ERRIE TX2IE TX1IE TX0IE RX1IE RX0IE

bit 7 bit 0

Legend:

R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’

-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown

bit 7 MERRE: Message Error Interrupt Enable bit

1 = Interrupt on error during message reception or transmission

0 =Disabled

bit 6 WAKIE: Wakeup Interrupt Enable bit

1 = Interrupt on CAN bus activity

0 =Disabled

bit 5 ERRIE: Error Interrupt Enable bit (multiple sources in EFLG register)

1 = Interrupt on EFLG error condition change

0 =Disabled

bit 4 TX2IE: Transmit Buffer 2 Empty Interrupt Enable bit

1 = Interrupt on TXB2 becoming empty

0 =Disabled

bit 3 TX1IE: Transmit Buffer 1 Empty Interrupt Enable bit

1 = Interrupt on TXB1 becoming empty

0 =Disabled

bit 2 TX0IE: Transmit Buffer 0 Empty Interrupt Enable bit

1 = Interrupt on TXB0 becoming empty

0 =Disabled

bit 1 RX1IE: Receive Buffer 1 Full Interrupt Enable bit

1 = Interrupt when message received in RXB1

0 =Disabled

bit 0 RX0IE: Receive Buffer 0 Full Interrupt Enable bit

1 = Interrupt when message received in RXB0

0 =Disabled