System Integration Unit (SIU)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
6-19
Preliminary
6.3.2.10
IRQ Falling-Edge Event Enable Register (SIU_IFEER)
The SIU_IFEER allows falling-edge-triggered events to be enabled on the corresponding IRQ
n
pins.
Setting the corresponding bits in the SIU_IREER and SIU_IFEER enables rising- and falling-edge events.
Offset:
SI 0x0028
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R NREE0 NREE1
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
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
IREE
15
IREE
14
IREE
13
IREE
12
IREE
11
IREE
10
IREE
9
IREE
8
IREE
7
IREE
6
IREE
5
IREE
4
IREE
3
IREE
2
IREE
1
IREE
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 6-10. IRQ Rising-Edge Event Enable Register (SIU_IREER)
Table 6-12. SIU_IREER Field Descriptions
Field
Function
NREEn
NREEn - NMI Rising-Edge Event Enable n. These write-once bits enable rising-edge-triggered events on the
corresponding NMIn input.
0 Rising edge event disabled.
1 Rising edge event enabled.
bits 2–15 Reserved.
IREEn
IRQ Rising-Edge Event Enable n. Enables rising-edge triggered events on the corresponding IRQn pin.
0 Rising edge event disabled.
1 Rising edge event enabled.
Offset:
SI 0x002C
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R NFEE0 NFEE1
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
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
IFEE
15
IFEE
14
IFEE
13
IFEE
12
IFEE
11
IFEE
10
IFEE
9
IFEE
8
IFEE
7
IFEE
6
IFEE
5
IFEE
4
IFEE
3
IFEE
2
IFEE
1
IFEE
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 6-11. IRQ Falling-Edge Event Enable Register (SIU_IFEER)