Cpm Interrupt Configuration Register (Cicr) - Freescale Semiconductor MPC850 User Manual

35.5.1 CPM Interrupt Configuration Register (CICR)
The CPM interrupt configuration register (CICR) defines CPM interrupt request levels, the
priority between the USB and SCCs, and the highest priority interrupt.
Bit 0 1
Field
Reset
R/W
Address
Bit 16 17
Field IRL
Reset
R/W
Add
Figure 35-3. CPM Interrupt Configuration Register (CICR)
CICR bits are described in Table 35-3.
Bits Name
0–7 — Reserved, should be cleared.
1
8–9 SCdP SCCd priority order. Defines whether USB or SCCs asserts its request in the SCCd priority position.
00 USB asserts its request in the SCCd position.
01 SCC2 asserts its request in the SCCd position.
10 SCC3 asserts its request in the SCCd position.
1
10–11 SCcP SCCc priority order. Defines whether USB or SCCs asserts its request in the SCCc priority position.
00 USB asserts its request in the SCCc position.
01 SCC2 asserts its request in the SCCc position.
10 SCC3 asserts its request in the SCCc position.
1
12–13 SCbP SCCb priority order. Defines whether USB or SCCs that asserts its request in the SCCb priority
position.
00 USB asserts its request in the SCCb position.
01 SCC2 asserts its request in the SCCb position.
10 SCC3 asserts its request in the SCCb position.
1
14–15 SCaP SCCa priority order. Defines whether USB or SCCs that asserts its request in the SCCa priority
position.
00 USB asserts its request in the SCCa position.
01 SCC2 asserts its request in the SCCa position.
10 SCC3 asserts its request in the SCCa position.
16–18 IRL Interrupt request level. Contains the priority request level of the interrupt from the CPM that is sent
to the SIU. Level 0 indicates highest priority. IRL is initialized to zero during reset. In most systems,
value 0b100 is a good value to choose for IRL.
2 3 4 5
—
0000_0000_0000_0000
18 19 20 21
HP
0000_0000_0000_0000
Table 35-3. CICR Field Descriptions
Chapter 35. CPM Interrupt Controller
6 7 8 9
—SCdP
R/W
0x940
22 23 24 25
IEN
R/W
0x942
Description
CPIC Registers
10 11 12 13
—SCcP —SCbP
26 27 28 29
—
14 15
—SCaP
30 31
SPS