ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 174

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

13.19.7
13.19.7.1
13.19.7.2
13.19.7.3
174
31
23
15
31
23
15
31
23
15
7
7
7
SAM3U Series
Interrupt Priority Registers
IPRm
IPR4
IPR3
30
22
14
30
22
14
30
22
14
6
6
6
The IPR0-IPR7 registers provide a 4-bit priority field for each interrupt (See the “Peripheral Iden-
tifiers” section of the datasheet for more details). These registers are byte-accessible. See the
register summary in
fields, that map up to four elements in the CMSIS interrupt priority array IP[0] to IP[29], as shown:
29
21
13
29
21
13
29
21
13
5
5
5
Table 13-27 on page 167
28
20
12
28
20
12
28
20
12
4
4
4
IP[4m+3]
IP[4m+2]
IP[4m+1]
IP[4m]
IP[19]
IP[18]
IP[17]
IP[16]
IP[15]
IP[14]
IP[13]
IP[12]
27
19
11
27
19
11
27
19
11
3
3
3
for their attributes. Each register holds four priority
26
18
10
26
18
10
26
18
10
2
2
2
25
17
25
17
25
17
9
1
9
1
9
1
6430D–ATARM–25-Mar-11
24
16
24
16
24
16
8
0
8
0
8
0