System Interface Unit (SIU)
MPC5553/MPC5554 Microcontroller Reference Manual,
Rev. 5
Freescale Semiconductor
6-17
6.3.1.9
IRQ Rising-Edge Event Enable Register (SIU_IREER)
The SIU_IREER enables rising-edge triggered events for the IRQ[
n
] signals. Enable rising- and
falling-edge events by setting the IREE[
n
] bit in both the SIU_IREER and SIU_IFEER.
Address: Base + 0x0024
Access: Read/ Write[16:31]
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Address: Base + 0x0024
Access: Read/ Write[16:31]
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
ORE15
ORE14
ORE13 ORE12 ORE11 ORE10
ORE9 ORE8 ORE7 ORE6 ORE5 ORE4 ORE3 ORE2 ORE1 ORE0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 6-10. Overrun Request Enable Register (SIU_ORER)
Table 6-12. SIU_ORER Field Descriptions
Register Bit Range
Field Name
Function
0–15
Reserved.
16–31
OREn
Overrun request enable n. Enables the corresponding overrun request when an overrun
occurs on the corresponding IRQ[n] pin.
0 Overrun request is disabled.
1 Overrun request is enabled.
Address: Base + 0x0028
Access: Read/Write [16:31]
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Address: Base + 0x0028
Access: Read/Write [16:31]
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
IREE15 IREE14 IREE13 IREE12 IREE11 IREE10 IREE9 IREE8 IREE7 IREE6 IREE5 IREE4 IREE3 IREE2 IREE1 IREE0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 6-11. IRQ Rising-Edge Event Enable Register (SIU_IREER)
Summary of Contents for MPC5553
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