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MCP2515
7.6.2
RECEIVER WARNING
7.6.6
BUS-OFF
The REC has reached the MCU warning limit of 96.
The TEC has exceeded 255 and the device has gone
to bus-off state.
7.6.3
TRANSMITTER WARNING
The TEC has reached the MCU warning limit of 96.
7.7
Interrupt Acknowledge
7.6.4
RECEIVER ERROR-PASSIVE
Interrupts are directly associated with one or more
status flags in the CANINTF register. Interrupts are
The REC has exceeded the error-passive limit of 127
and the device has gone to error-passive state.
pending 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
7.6.5
TRANSMITTER ERROR-PASSIVE
removed.
The TEC has exceeded the error-passive limit of 127
and the device has gone to error-passive state.
REGISTER 7-1:
CANINTE – INTERRUPT ENABLE
(ADDRESS: 2Bh)
R/W-0
MERRE
R/W-0
WAKIE
R/W-0
ERRIE
R/W-0
TX2IE
R/W-0
TX1IE
R/W-0
TX0IE
R/W-0
RX1IE
R/W-0
RX0IE
bit 7
Legend:
bit 0
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
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
MERRE: Message Error Interrupt Enable bit
1 = Interrupt on error during message reception or transmission
0 = Disabled
WAKIE: Wake-up Interrupt Enable bit
1 = Interrupt on CAN bus activity
0 = Disabled
ERRIE: Error Interrupt Enable bit (multiple sources in EFLG register)
1 = Interrupt on EFLG error condition change
0 = Disabled
TX2IE: Transmit Buffer 2 Empty Interrupt Enable bit
1 = Interrupt on TXB2 becoming empty
0 = Disabled
TX1IE: Transmit Buffer 1 Empty Interrupt Enable bit
1 = Interrupt on TXB1 becoming empty
0 = Disabled
TX0IE: Transmit Buffer 0 Empty Interrupt Enable bit
1 = Interrupt on TXB0 becoming empty
0 = Disabled
RX1IE: Receive Buffer 1 Full Interrupt Enable bit
1 = Interrupt when message received in RXB1
0 = Disabled
RX0IE: Receive Buffer 0 Full Interrupt Enable bit
1 = Interrupt when message received in RXB0
0 = Disabled
DS21801G-page 52
? 2003-2012 Microchip Technology Inc.
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