MC912DG128A Motorola, MC912DG128A Datasheet - Page 303

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

msCAN12
Transmitter Flag
Register (CTFLG)
35-mscan12
MOTOROLA
CTFLG
$0106
RESET
W
R
NOTE:
Bit 7
0
0
BOFFIE — BUSOFF Interrupt Enable
OVRIE — Overrun Interrupt Enable
RXFIE — Receiver Full Interrupt Enable
The CRIER register is held in the reset state if the SFTRES bit in CMCR0
is set.
The Abort Acknowledge flags are read only. The Transmitter Buffer
Empty flags are read and clear only. A flag can be cleared by writing a1
to the corresponding bit position. Writing a zero has no effect on the flag
setting. The Transmitter Buffer Empty flags each have an associated
interrupt enable flag in the CTCR register. A hard or soft reset will reset
the register.
ABTAK2 – ABTAK0 — Abort Acknowledge
ABTAK2
This flag acknowledges that a message has been aborted due to a
pending abort request from the CPU. After a particular message
buffer has been flagged empty, this flag can be used by the
application software to identify whether the message has been
aborted successfully or has been sent in the meantime. The flag is
reset implicitly whenever the associated TXE flag is set to 0.
6
0
0 = No interrupt will be generated from this event.
1 = A BUSOFF event will result in an error interrupt.
0 = No interrupt will be generated from this event.
1 = An overrun event will result in an error interrupt.
0 = No interrupt will be generated from this event.
1 = A receive buffer full (successful message reception) event will
0 = The massage has not been aborted, thus has been sent out.
1 = The message has been aborted.
result in a receive interrupt.
ABTAK1
5
0
MSCAN Controller
ABTAK0
4
0
3
0
0
Programmer’s Model of Control Registers
TXE2
2
1
MC68HC912DT128A Rev 2.0
TXE1
1
1
MSCAN Controller
TXE0
Bit 0
1
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