ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 64

• 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

12.4.3.6
• N
Negative or less than flag:
0 = operation result was positive, zero, greater than, or equal
1 = operation result was negative or less than.
• Z
Zero flag:
0 = operation result was not zero
1 = operation result was zero.
64
64
31
23
15
N
7
SAM3X/A
SAM3X/A
Application Program Status Register
30
22
14
Z
6
The PSR bit assignments are:
Access these registers individually or as a combination of any two or all three registers, using
the register name as an argument to the MSR or MRS instructions. For example:
The PSR combinations and attributes are:
Table 12-3.
1.
2.
See the instruction descriptions
tion about how to access the program status registers.
The APSR contains the current state of the condition flags from previous instruction executions.
See the register summary in
Register
PSR
IEPSR
IAPSR
EAPSR
• read all of the registers using PSR with the MRS instruction
• write to the APSR using APSR with the MSR instruction.
The processor ignores writes to the IPSR bits.
Reads of the EPSR bits return zero, and the proces-
29
21
13
C
5
sor ignores writes to the these bits.
Type
RW
RO
RW
RW
PSR register combinations
(1)
(2)
(1), (2)
ICI/IT
Combination
EPSR and IPSR
APSR, EPSR, and IPSR
APSR and IPSR
APSR and EPSR
28
20
12
V
4
ISR_NUMBER
Table 12-2 on page 62
Reserved
“MRS” on page 151
27
19
11
Q
3
for its attributes. The bit assignments are:
and
26
18
10
2
“MSR” on page 152
ICI/IT
Reserved
25
17
9
1
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
for more informa-
ISR_NUMBER
24
16
T
8
0