HD6432621 Hitachi, HD6432621 Datasheet - Page 577

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

15.2.8
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.
Bits 15 to 9 and 7 to 0—Abort Acknowledge Register (ABACK7 to ABACK1, ABACK15 to
ABACK8): 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.
Initial value:
Initial value:
ABACK
Note: * Can only be written with 1 for flag clearing.
Abort Acknowledge Register (ABACK)
R/W:
R/W:
Bit:
Bit:
ABACK15 ABACK14 ABACK13 ABACK12 ABACK11 ABACK10 ABACK9 ABACK8
ABACK7
R/(W)*
R/(W)*
Description
[Clearing condition]
Writing 1
Completion of transmit message cancellation for corresponding mailbox
15
0
7
0
ABACK6 ABACK5
R/(W) * R/(W) *
R/(W) * R/(W) *
14
0
6
0
13
0
5
0
ABACK4 ABACK3
R/(W) *
R/(W)*
12
0
4
0
R/(W) *
R/(W)*
11
0
3
0
ABACK2
R/(W) *
R/(W) *
10
0
2
0
ABACK1
R/(W) *
R/(W) * R/(W) *
9
0
1
0
(Initial value)
—
8
0
R
0
0
533