SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 64

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

11.4.3.14
• 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
that higher priority field values correspond to lower exception priorities.
64
64
31
23
15
7
SAM3X/A
SAM3X/A
Base Priority Mask Register
30
22
14
6
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. See the register summary in
butes. The bit assignments are:
29
21
13
5
“Interrupt Priority Registers” on page 160
28
20
12
4
Reserved
Reserved
Reserved
BASEPRI
27
19
11
3
26
18
10
2
Table 11-2 on page 58
for more information. Remember
25
17
9
1
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
for its attri-
24
16
8
0