DCAN Registers
23.4.8 ABOTR Register (offset = 80h) [reset = 0h]
ABOTR is shown in
and described in
On write access to the CAN control register while Auto-Bus-On timer is running, the Auto-Bus-On
procedure will be aborted. During Debug/Suspend mode, running Auto-Bus-On timer will be paused.
Figure 23-26. ABOTR Register
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
ABO_Time
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 23-21. ABOTR Register Field Descriptions
Bit
Field
Type
Reset
Description
31-0
ABO_Time
R/W
0h
Number of OCP clock cycles before a Bus-Off recovery sequence is
started by clearing the Init bit.
This function has to be enabled by setting bit ABO in CAN control
register.
The Auto-Bus-On timer is realized by a 32 bit counter that starts to
count down to zero when the module goes Bus-Off.
The counter will be reloaded with the preload value of the ABO time
register after this phase.
3934
Controller Area Network (CAN)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated