System Interface Unit (SIU)
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
4-10 Freescale Semiconductor
relative ordering of the interrupts, but, in general, relative priorities are as shown. A single interrupt priority number is associated with each table entry.Note that the group and spread options, shown with YCC entries in Tab le 4-2 , are described in Section 4.2.2.1, “SCC, FCC, and MCC Relative Priority.”

Table4-2. Interrupt Source Priority Levels

Priority Level Interrupt Source Description Multiple Events
1 Highest
2 XSIU1 No (TMCNT,PIT,PCI1 = Yes)
3 XSIU2 (Grouped) No (TMCNT,PIT,PCI1 = Yes)
4 XSIU3 (Grouped) No (TMCNT,PIT,PCI1 = Yes)
5 XSIU4 (Grouped) No (TMCNT,PIT,PCI1= Yes)
6 XCC1 Yes
7 XCC2 Yes
8 XCC3 Yes
9 XCC4 Yes
10 XSIU2 (Spread) No (TMCNT,PIT,PCI1 = Yes)
11 XCC5 Yes
12 XCC6 Yes
13 XCC7 Yes
14 XCC8 Yes
15 XSIU5 (Grouped) No (TMCNT,PIT,PCI1 = Yes)
16 XSIU6 (Grouped) No (TMCNT,PIT,PCI1 = Yes)
17 XSIU7 (Grouped) No (TMCNT,PIT,PCI1 = Yes)
18 XSIU8 (Grouped) No (TMCNT,PIT,PCI1 = Yes)
19 XSIU3 (Spread) No (TMCNT,PIT,PCI1 = Yes)
20 YCC1 (Grouped) Yes
21 YCC2 (Grouped) Yes
22 YCC3 (Grouped) Yes
23 YCC4 (Grouped) Yes
24 YCC5 (Grouped) Yes
25 YCC6 (Grouped) Yes
26 YCC7 (Grouped) Yes