MC68HC08AZ16 Datasheet, PDF (361/527 Pages) Motorola, Inc – HCMOS Microcontroller Unit

msCAN08 Controller (msCAN08)
Interrupts
MC68HC08AZ32
360
The msCAN08 supports four interrupt vectors mapped onto eleven
different interrupt sources, any of which can be individually masked (for
details see msCAN08 receiver flag register (CRFLG) on page 382 to
msCAN08 Transmitter Control Register (CTCR) on page 387):
• Transmit Interrupt: At least one of the three transmit buffers is
empty (not scheduled) and can be loaded to schedule a message
for transmission. The TXE flags of the empty message buffers are
set.
• Receive Interrupt: A message has been successfully received and
loaded into the foreground receive buffer. This interrupt will be
emitted immediately after receiving the EOF symbol. The RXF flag
is set.
• Wake-Up Interrupt: An activity on the CAN bus occurred during
msCAN08 internal sleep mode.
• Error Interrupt: An overrun, error or warning condition occurred.
The Receiver Flag Register (CRFLG) will indicate one of the
following conditions:
– Overrun: An overrun condition as described in Receive
structures on page 352, has occurred.
– Receiver Warning: The Receive Error Counter has reached
the CPU Warning limit of 96.
– Transmitter Warning: The Transmit Error Counter has reached
the CPU Warning limit of 96.
– Receiver Error Passive: The Receive Error Counter has
exceeded the Error Passive limit of 127 and msCAN08 has
gone to Error Passive state.
– Transmitter Error Passive: The Transmit Error Counter has
exceeded the Error Passive limit of 127 and msCAN08 has
gone to Error Passive state.
– Bus Off: The Transmit Error Counter has exceeded 255 and
msCAN08 has gone to Bus Off state.
msCAN08 Controller (msCAN08)
14-can
MOTOROLA