Interrupt Controller (INTC)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
9-12
Freescale Semiconductor
Preliminary
The software set/clear interrupt registers support the setting or clearing of software settable interrupt
request. These registers contain eight independent sets of bits to set and clear a corresponding flag bit by
software. Except for being set by software, this flag bit behaves the same as a flag bit set within a
peripheral. This flag bit generates an interrupt request within the INTC like a peripheral interrupt request.
Writing a 1 to SETn will leave SETn unchanged at 0 but sets CLRn. Writing a 0 to SETn has no effect.
CLRn is the flag bit. Writing a 1 to CLRn clears it. Writing a 0 to CLRn has no effect. If a 1 is written
simultaneously to a pair of SETn and CLRn bits, CLRn
will be asserted, regardless of whether CLRn was
asserted before the write.
9.3.2.9
INTC Priority Select Registers (INTC_PSR0_3–INTC_PSR292_293)
Table 9-8. INTC_SSCIR[0:7] Field Descriptions
Field
Description
SETn
Set Flag Bits. Writing a 1 sets the corresponding CLRn bit. Writing a 0 has no effect. Each SETn always will
be read as a 0.
CLRn
Clear Flag Bits. CLRn is the flag bit. Writing a 1 to CLRn clears it provided that a 1 is not written
simultaneously to its corresponding SETn bit. Writing a 0 to CLRn has no effect.
0 Interrupt request not pending within INTC.
1 Interrupt request pending within INTC.
Offset: 0x0040
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
PRC_SEL0
0
0
PRI0
PRC_SEL1
0
0
PRI1
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
PRC_SEL2
0
0
PRI2
PRC_SEL3
0
0
PRI3
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 9-11. INTC Priority Select Register 0–3 (INTC_PSR0–3)
Offset: 0x0164
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
PRC_
SEL292
0
0
PRI292
PRC_
SEL293
0
0
PRI293
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
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 9-12. INTC Priority Select Register 292–293 (INTC_PSR292–293)