MC68HC08AZ60ACFU MOTOROLA [Motorola, Inc], MC68HC08AZ60ACFU Datasheet - Page 387
MC68HC08AZ60ACFU
Manufacturer Part Number
MC68HC08AZ60ACFU
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC08AZ60ACFU.pdf
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21.14.7 MSCAN08 Transmitter Flag Register
MC68HC08AZ60A — Rev 0.0
MOTOROLA
Address:
The Abort Acknowledge flags are read only. The Transmitter Buffer
Empty flags are read and clear only. A flag can be cleared by writing a 1
to the corresponding bit position. Writing a 0 has no effect on the flag
setting. The Transmitter Buffer Empty flags each have an associated
interrupt enable bit in the CTCR register. A hard or soft reset will resets
the register.
ABTAK2–ABTAK0 — Abort Acknowledge
TXE2–TXE0 — Transmitter Empty
Reset:
Read:
Write:
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. The ABTAKx flag is cleared
implicitly whenever the corresponding TXE flag is cleared.
This flag indicates that the associated transmit message buffer is
empty, thus not scheduled for transmission. The CPU must
handshake (clear) the flag after a message has been set up in the
transmit buffer and is due for transmission. The MSCAN08 sets the
flag after the message has been sent successfully. The flag is also set
by the MSCAN08 when the transmission request was successfully
1 = The message has been aborted.
0 = The message has not been aborted, thus has been sent out.
$0506
Bit 7
Figure 21-21. Transmitter Flag Register (CTFLG)
MSCAN08 Controller (MSCAN08)
0
0
= Unimplemented
ABTAK2
5
6
0
ABTAK1
5
0
ABTAK0
4
0
Programmer’s Model of Control Registers
3
0
0
MSCAN08 Controller (MSCAN08)
TXE2
2
1
Advance Information
TXE1
1
1
TXE0
Bit 0
1
387
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