HD64F2638F20J Datasheet, PDF (678/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 16 Controller Area Network (HCAN)
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
16.2.8 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: 15
14
13
12
11
10
9
8
ABACK7 ABACK6 ABACK5 ABACK4 ABACK3 ABACK2 ABACK1 —
Initial value: 0
0
0
0
0
0
0
0
R/W: R/(W)^* R/(W)^* R/(W)^* R/(W)^* R/(W)^* R/(W)^* R/(W)^*
R
Bit: 7
6
5
4
3
2
1
0
ABACK15 ABACK14 ABACK13 ABACK12 ABACK11 ABACK10 ABACK9 ABACK8
Initial value: 0
0
0
0
0
0
0
0
R/W: R/(W)^* R/(W)^* R/(W)^* R/(W)^* R/(W)^* R/(W)^* R/(W)^* 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 (ABACK7 to ABACK1, ABACK15 to
ABACK8): These bits indicate that a transmit message in the corresponding mailbox has been
canceled (aborted) normally.
Bit y: ABACKx
0
1
Description
[Clearing condition]
• Writing 1
(Initial value)
Completion of transmit message cancellation for corresponding mailbox
(x = 15 to 1, y = 15 to 9 and 7 to 0)
Bit 8—Reserved: This bit always reads 0. The write value should always be 0.
Page 628 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010