Motorola MPC823e Reference Manual page 961

Communication Processor Module
SCCP—SCCc Priority Order
This field defines whether the USB or SCCs will assert a request in the SCCc priority
position.
00 = USB will assert its request in the SCCc position.
01 = SCC2 will assert its request in the SCCc position.
10 = SCC3 will assert its request in the SCCc position.
11 = Neither the USB or SCCx will assert its request in the SCCc position.
SCBP—SCCb Priority Order
This field defines whether the USB or SCCs will assert a 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 will assert its request in the SCCb position.
11 = Neither the USB or SCCx will assert its request in the SCCb position.
SCAP—SCCa Priority Order
This field defines whether the USB or SCCs will assert a 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 will assert its request in the SCCa position.
11 = Neither the USB or SCCx will assert its request in the SCCa position.
Note: You must not program the USB or SCCs to more than one priority position (a, b,
c, or d). These bits may be changed dynamically.
IRL—Interrupt Request Level
This field contains the priority request level of the interrupt from the communication
processor module that is sent to the core. Level 0 indicates the highest priority interrupt and
level 7 indicates the lowest. The IRL field is initialized to zero during reset. In most systems,
value 0x4 is a good value to choose for these bits.
000 = Highest priority interrupt.
111 = Lowest priority interrupt.
HP—Highest Priority
This field specifies the 5-bit interrupt number of the single CPM interrupt controller's interrupt
source that is advanced to the highest priority in the table. These bits can be dynamically
modified. To keep the original priority order intact, simply program these bits to 11111.
16-507 MPC823e REFERENCE MANUAL MOTOROLA