SAM3U2C Atmel Corporation, SAM3U2C Datasheet - Page 185

• Manufacturer Part Number: SAM3U2C
• Manufacturer: Atmel Corporation

Specifications of SAM3U2C

• Flash (kbytes): 128 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 96 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 28
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 57
• Ext Interrupts: 57
• Usb Transceiver: 1
• Quadrature Decoder Channels: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device
• Spi: 4
• Twi (i2c): 1
• Uart: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 36
• 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

13.20.6
• 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
186.
• 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.
6430E–ATARM–29-Aug-11
ENDIANESS
31
23
15
7
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
178
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 13-33 on page 205
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-
SAM3U Series
ACTIVE
25
17
9
1
“Binary point” on page
Table 13-30 on page
VECTRESET
24
16
8
0
185