Abort Acknowledge Register (Aback) - Renesas H8SX/1520 Series Hardware Manual

Section 13 Controller Area Network (HCAN)
13.3.8

Abort Acknowledge Register (ABACK)

ABACK indicates the normal cancellation of transmit messages in mailboxes.
Bit
Bit Name
Initial Value
R/W
Bit
Bit Name
Initial Value
R/W
Note: * Only 1 can be written to these bits, to clear the flags.
Bit Bit Name
15 ABACK7
14 ABACK6
13 ABACK5
12 ABACK4
11 ABACK3
10 ABACK2
9 ABACK1

8
7 ABACK15
6 ABACK14
5 ABACK13
4 ABACK12
3 ABACK11
2 ABACK10
1 ABACK9
0 ABACK8
Note: Only 1 can be written to clear the flag.
*
Rev. 3.00 Mar. 14, 2006 Page 462 of 804
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15 14
ABACK7 ABACK6 ABACK5
0 0
R/(W)* R/(W)* R/(W)*
7 6
ABACK15 ABACK14 ABACK13
0 0
R/(W)* R/(W)* R/(W)*
Initial
Value
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
13 12 11
ABACK4 ABACK3
0 0 0
R/(W)* R/(W)*
5 4 3
ABACK12 ABACK11
0 0 0
R/(W)* R/(W)*
R/W Description
R/(W)* These bits are status flags that indicate error-free
cancellation (abortion) of the transmit message in
R/(W)*
the corresponding mailboxes 1 to 15. When the
R/(W)*
message in mailbox n (n = 1 to 15) has been
canceled error-free, ABACKn is set to 1.
R/(W)*
[Setting condition]
R/(W)*
Completion of transmit message cancellation for
R/(W)*
corresponding mailbox
R/(W)*
[Clearing condition]
R
Writing 1
R/(W)*
Bit 8 is reserved. This is a read-only bit and
R/(W)*
cannot be modified.
R/(W)*
R/(W)*
R/(W)*
R/(W)*
R/(W)*
R/(W)*
10 9
ABACK2 ABACK1
0 0
R/(W)* R/(W)*
2 1
ABACK10 ABACK9 ABACK8
0 0
R/(W)* R/(W)* R/(W)*
8
—
0
R
0
0