Chapter 25 FlexCAN
MPC5606BK Microcontroller Reference Manual, Rev. 2
574
Freescale Semiconductor
25.4.4.12 Interrupt Flags 1 (IFLAG1) register
This register defines the flags for 32 Message Buffer interrupts and FIFO interrupts. It contains one
interrupt flag bit per buffer. Each successful transmission or reception sets the corresponding IFLAG1 bit.
If the corresponding IMASK1 bit is set, an interrupt will be generated. The Interrupt flag must be cleared
by writing it to 1. Writing 0 has no effect.
When the MCR[AEN] bit is set (Abort enabled), while the IFLAG1 bit is set for a MB configured as Tx,
the writing access done by CPU into the corresponding MB will be blocked.
When the MCR[FEN] bit is set (FIFO enabled), the function of the 8 least significant interrupt flags
(BUF7I–BUF0I) is changed to support the FIFO operation. BUF7I, BUF6I, and BUF5I indicate operating
conditions of the FIFO, while BUF4I to BUF0I are not used.
Offset: 0x002C
Access: Read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R BUF
63I
BUF
62I
BUF
61I
BUF
60I
BUF
59I
BUF
58I
BUF
57I
BUF
56I
BUF
55I
BUF
54I
BUF
53I
BUF
52I
BUF
51I
BUF
50I
BUF
49I
BUF
48I
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R BUF
47I
BUF
46I
BUF
45I
BUF
44I
BUF
43I
BUF
42I
BUF
41I
BUF
40I
BUF
39I
BUF
38I
BUF
37I
BUF
36I
BUF
35I
BUF
34I
BUF
33I
BUF
32I
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 25-13. Interrupt Flags 2 (IFLAG2) register
Table 25-18. IFLAG2 field descriptions
Field
Description
BUF
n
I
Buffer MB
n
Interrupt
Each bit flags the respective FlexCAN Message Buffer (MB32 to MB63) interrupt.
0 No such occurrence
1 The corresponding buffer has successfully completed transmission or reception
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