MC68HC08AZ60ACFU MOTOROLA [Motorola, Inc], MC68HC08AZ60ACFU Datasheet - Page 357

• Manufacturer Part Number: MC68HC08AZ60ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

21.7 Interrupts
MC68HC08AZ60A — Rev 0.0
MOTOROLA
Example 1: to receive the message IDs
xxxx xxxx x011 111x xxxx xxxx xxxx xxxx
IDMR1 etc. must be 111x xxx1, i.e. ID20,19,18,15 must be masked.
Example 2: to receive the message IDs
xxxx 0111 1111 111x xxxx xxxx xxxx xxxx
IDMR1 etc. must be 1xxx xxx1, i.e. ID20 and ID15 must be masked.
In general, using IDMR1 etc. 1111 xxx1, i.e. masking
ID20,19,18,SRR,15, hides the problem.
The MSCAN08 supports four interrupt vectors mapped onto eleven
different interrupt sources, any of which can be individually masked (for
details see
to
MSCAN08 Transmitter Control Register
•
•
•
•
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 received successfully and
loaded into the foreground receive buffer. This interrupt will be
emitted immediately after receiving the EOF symbol. The RXF flag
is set.
Wakeup Interrupt: An activity on the CAN bus occurred during
MSCAN08 internal sleep mode or power-down mode (provided
SLPAK = WUPIE = 1).
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
– Receiver Warning: The receive error counter has reached the
Structures
CPU Warning limit of 96.
MSCAN08 Controller (MSCAN08)
MSCAN08 Receiver Flag Register (CRFLG)
on page 348, has occurred.
MSCAN08 Controller (MSCAN08)
on page 388).
Advance Information
Receive
on page 383,
Interrupts
357