SAM3U4E Atmel Corporation, SAM3U4E Datasheet - Page 60
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SAM3U4E
Manufacturer Part Number
SAM3U4E
Description
Manufacturer
Atmel Corporation
Specifications of SAM3U4E
Flash (kbytes)
256 Kbytes
Pin Count
144
Max. Operating Frequency
96 MHz
Cpu
Cortex-M3
# Of Touch Channels
57
Hardware Qtouch Acquisition
No
Max I/o Pins
96
Ext Interrupts
96
Usb Transceiver
1
Quadrature Decoder Channels
1
Usb Speed
Hi-Speed
Usb Interface
Device
Spi
5
Twi (i2c)
2
Uart
5
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
50
Self Program Memory
YES
External Bus Interface
1
Dram Memory
No
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
1.62 to 3.6
Fpu
No
Mpu / Mmu
Yes / No
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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13.3.3.6
• 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.
60
31
23
15
N
7
SAM3U Series
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 13-3.
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
EPSR and IPSR
Combination
APSR, EPSR, and IPSR
APSR and IPSR
APSR and EPSR
28
20
12
V
4
ISR_NUMBER
Table 13-2 on page 57
Reserved
“MRS” on page 157
27
19
11
Q
3
for its attributes. The bit assignments are:
and
26
18
10
2
“MSR” on page 158
ICI/IT
Reserved
25
17
9
1
6430E–ATARM–29-Aug-11
for more informa-
ISR_NUMBER
24
16
T
8
0
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