SAM3U4E Atmel Corporation, SAM3U4E Datasheet - Page 181
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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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13.20.4
• PENDSVSET
RW
PendSV set-pending bit.
Write:
0 = no effect
1 = changes PendSV exception state to pending.
Read:
0 = PendSV exception is not pending
1 = PendSV exception is pending.
Writing 1 to this bit is the only way to set the PendSV exception state to pending.
• PENDSVCLR
WO
PendSV clear-pending bit.
Write:
0 = no effect
1 = removes the pending state from the PendSV exception.
6430E–ATARM–29-Aug-11
Reserved for
Reserved
Debug
31
23
15
7
Interrupt Control and State Register
ISRPENDING
30
22
14
6
VECTPENDING
Reserved
The ICSR:
See the register summary in
on page
• provides:
• indicates:
– set-pending and clear-pending bits for the PendSV and SysTick exceptions
– the exception number of the exception being processed
– whether there are preempted active exceptions
– the exception number of the highest priority pending exception
– whether any interrupts are pending.
205, for the ICSR attributes. The bit assignments are:
29
21
13
5
PENDSVSET
28
20
12
4
VECTACTIVE
Table 13-30 on page
PENDSVCLR
RETTOBASE
27
19
11
3
VECTPENDING
178, and the Type descriptions in
PENDSTSET
26
18
10
2
Reserved
PENDSTCLR
SAM3U Series
25
17
9
1
VECTACTIVE
Table 13-33
Reserved
24
16
8
0
181
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