MC912DG128A Motorola, MC912DG128A Datasheet - Page 280

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

Interrupt
Acknowledge
Interrupt Vectors
MSCAN Controller
MC68HC912DT128A Rev 2.0
280
NOTE:
Interrupts are directly associated with one or more status flags in either
the msCAN12 receiver flag register (CRFLG) or the msCAN12
transmitter flag register (CTFLG). Interrupts are pending as long as one
of the corresponding flags is set. The flags in above registers must be
reset within the interrupt handler in order to handshake the interrupt. The
flags are reset through writing a 1 to the corresponding bit position. A
flag can not be cleared if the respective condition still prevails.
Bit manipulation instructions (BSET) shall not be used to clear interrupt
flags.
The msCAN12 supports four interrupt vectors as shown in
vector addresses and the relative interrupt priority are dependent on the
chip integration and to be defined.
– Receiver error passive: the receive error counter has
– Transmitter error passive: the transmit error counter has
– Bus off: the transmit error counter has exceeded 255 and
exceeded the error passive limit of 127 and msCAN12 has
gone to error passive state.
exceeded the error passive limit of 127 and msCAN12 has
gone to error passive state.
msCAN12 has gone to BUSOFF state.
MSCAN Controller
Table
MOTOROLA
12-mscan12
38. The