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
7.7
Interrupt Acknowledge
The TEC has reached the MCU warning limit of 96.
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.
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.
REGISTER 7-1:
CANINTE – INTERRUPT ENABLE
(ADDRESS: 2Bh)
R/W-0
R/W-0
R/W-0
ERRIE
R/W-0
TX2IE
R/W-0
TX1IE
R/W-0
TX0IE
R/W-0
RX1IE
R/W-0
RX0IE
MERRE
WAKIE
bit 7
bit 0
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: Wakeup 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
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
‘1’ = Bit is set
DS21801D-page 50
Preliminary
© 2005 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
