Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO データシート
製品コード
ATSAM4E-XPRO
57
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
12.4.1.15 Base Priority Mask Register
Name:
BASEPRI
Access: Read/Write
Reset: 0x000000000
The BASEPRI register defines the minimum priority for exception processing. When BASEPRI is set to a nonzero value, it
prevents the activation of all exceptions with same or lower priority level as the BASEPRI value.
prevents the activation of all exceptions with same or lower priority level as the BASEPRI value.
BASEPRI
Priority mask bits:
0x0000: No effect
Nonzero: Defines the base priority for exception processing
The processor does not process any exception with a priority value greater than or equal to BASEPRI.
This field is similar to the priority fields in the interrupt priority registers. The processor implements only bits[7:4] of this
field, bits[3:0] read as zero and ignore writes. See
field, bits[3:0] read as zero and ignore writes. See
for more information. Remember that
higher priority field values correspond to lower exception priorities.
31
30
29
28
27
26
25
24
–
23
22
21
20
19
18
17
16
–
15
14
13
12
11
10
9
8
–
7
6
5
4
3
2
1
0
BASEPRI