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15.2.8
Abort Acknowledge Register (ABACK)
The abort acknowledge register (ABACK) is a 16-bit readable/writable register containing status
flags that indicate normal cancellation (aborting) of a mailbox (buffer) transmit messages.
ABACK
Bit:
Initial value:
R/W:
Bit:
ABACK15 ABACK14 ABACK13 ABACK12 ABACK11 ABACK10 ABACK9 ABACK8
Initial value:
R/W:
Note: * Only a write of 1 is permitted, to clear the flag.
Bits 15 to 9 and 7 to 0—Abort Acknowledge Register: These bits indicate that a transmit
message in the corresponding mailbox has been canceled (aborted) normally.
Bit x: ABACKx
0
1
Bit 8—Reserved: This bit always reads 0. The write value should always be 0.
544
15
14
ABACK7
ABACK6 ABACK5
0
0
R/(W)*
R/(W)*
R/(W)*
7
6
0
0
R/(W)*
R/(W)*
R/(W)*
Description
[Clearing condition]
Writing 1
Completion of transmit message cancellation for corresponding mailbox
13
12
11
ABACK4 ABACK3
0
0
0
R/(W)*
R/(W)*
5
4
3
0
0
0
R/(W)*
R/(W)*
10
9
ABACK2
ABACK1
0
0
R/(W)*
R/(W)*
2
1
0
0
R/(W)*
R/(W)*
R/(W)*
(Initial value)
(x = 15 to 0)
8
—
0
—
0
0
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