Preface
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
21-9
21.3.3
Register Descriptions
The FlexCAN2 registers are described in this section. Note that there are three separate, identical
FlexCAN2 modules. Each register in the following sections is denoted with an ‘
x
’ that represents the
specified module.
21.3.3.1
Module Configuration Register (CAN
x
_MCR)
CAN
x
_MCR defines global system configurations, such as the module operation mode and maximum
message buffer configuration. Most of the fields in this register can be accessed at any time, except the
MAXMB field, which should only be changed while the module is in freeze mode.
0
1010
1010
Transmit a data frame whenever a remote request frame with the
same ID is received. This MB participates simultaneously in both the
matching and arbitration processes. The matching process
compares the ID of the incoming remote request frame with the ID of
the MB. If a match occurs this MB is allowed to participate in the
current arbitration process and the CODE field is automatically
updated to ‘1110’ to allow the MB to participate in future arbitration
runs. When the frame is eventually transmitted successfully, the
Code automatically returns to ‘1010’ to restart the process again.
0
1110
1010
the MBM as a result of match to a remote request frame. The data
frame will be transmitted unconditionally once and then the code will
automatically return to ‘1010’. The CPU can also write this code with
the same effect.
Address: Base + 0x0000
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
MDIS FRZ
0
HALT
NOTRDY
0
SOFTRST
FRZACK
1
0
WRN
EN
MDISACK
0
0
SRX
DIS
MBFEN
W
Reset
0
1
0
1
1
0
0
1
1
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
0
0
0
0
0
0
0
0
0
0
MAXMB
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
Figure 21-3. Module Configuration Register (CAN
x
_MCR)
Table 21-6. Message Buffer Code for TX Buffers (continued)
RTR
Initial TX
Code
Code after
Successful
Transmission
Description
Содержание MPC5565
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