ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 176

• Manufacturer Part Number: ATSAM3X4EA-AU
• Description: ARM Microcontrollers - MCU QFP144,GREEN, IND TEMP, MRL A
• Manufacturer: Atmel

Specifications of ATSAM3X4EA-AU

• Rohs: yes
• Core: ARM Cortex M3
• Processor Series: SAM3X
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 84 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.4 V to 3.6 V
• Operating Temperature Range: - 40 C to +85 C
• Package / Case: LQFP-144
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 60

12.21.6
• VECTKEYSTAT
Register Key:
Reads as 0xFA05
• VECTKEY
Register key:
On writes, write 0x5FA to VECTKEY, otherwise the write is ignored.
• ENDIANESS
RO
Data endianness bit:
0: Little-endian
ENDIANESS is set from the BIGEND configuration signal during reset.
• PRIGROUP
R/W
Interrupt priority grouping field. This field determines the split of group priority from subpriority, see
177.
• SYSRESETREQ
WO
System reset request:
0: no effect
1: asserts a proc_reset_signal.
This is intended to force a large system reset of all major components except for debug.
This bit reads as 0.
176
176
ENDIANESS
31
23
15
7
SAM3X/A
SAM3X/A
Application Interrupt and Reset Control Register
30
22
14
6
The AIRCR provides priority grouping control for the exception model, endian status for data
accesses, and reset control of the system. See the register summary in
169
To write to this register, you must write 0x05FA to the VECTKEY field, otherwise the processor
ignores the write.
The bit assignments are:
and
Reserved
Table 12-33 on page 194
29
21
13
5
On Read: VECTKEYSTAT, On Write: VECTKEY
On Read: VECTKEYSTAT, On Write: VECTKEY
Reserved
28
20
12
4
for its attributes.
27
19
11
3
SYSRESETREQ
26
18
10
2
PRIGROUP
VECTCLR-
ACTIVE
25
17
9
1
“Binary point” on page
Table 12-30 on page
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
VECTRESET
24
16
8
0