Motorola MPC8260 - Manual (Page 158)

4-20 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA
Part II. ConÞguration and Reset
Table 4-6 describes SCPRR_H Þelds.
The CPM low interrupt priority register (SCPRR_L), shown in Figure 4-13, deÞnes
prioritization of SCCs.
Table 4-7 describes SCPRR_L Þelds.
Table 4-6. SCPRR_H Field Descriptions
Bits Name Description
0Ð2 XC1PÐXCC1 Priority order. DeÞnes which FCC/MCC asserts its request in the XCC1 priority position.
The user should not program the same FCC/MCC to more than one priority position (1Ð8).
These bits can be changed dynamically.
000 FCC1 asserts its request in the XCC1 position.
001 FCC2 asserts its request in the XCC1 position.
010 FCC3 asserts its request in the XCC1 position.
011 XCC1 position not active.
100 MCC1 asserts its request in the XCC1 position.
101 MCC2 asserts its request in the XCC1 position.
110 XCC1 position not active.
111 XCC1 position not active.
3Ð12 XC2PÐXC8P Same as XC1P, but for XCC2ÐXCC8
13Р15 С Reserved, should be cleared.
Bits 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Field YC1P YC2P YC3P YC4P Ñ
Reset 000 001 010 011 0000
R/W R/W
Addr 0x10C18
Bits 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Field YC5P YC6P YC7P YC8P Ñ
Reset 100 101 110 111 0000
R/W R/W
Addr 0x10C20
Figure 4-13. CPM Low Interrupt Priority Register (SCPRR_L)
Table 4-7. SCPRR_L Field Descriptions
Bits Name Description
0Ð2 YC1PÐYCC1 Priority order. DeÞnes which SCC asserts its request in the YCC1 priority position. Do not
program the same SCC to multiple priority positions. This Þeld can be changed dynamically.
000 SCC1 asserts its request in the YCC1 position.
001 SCC2 asserts its request in the YCC1 position.
010 SCC3 asserts its request in the YCC1 position.
011 SCC4 asserts its request in the YCC1 position.
1XX YCC1 position is not active.