SAM3S4C Atmel Corporation, SAM3S4C Datasheet - Page 203
SAM3S4C
Manufacturer Part Number
SAM3S4C
Description
Manufacturer
Atmel Corporation
Specifications of SAM3S4C
Flash (kbytes)
256 Kbytes
Pin Count
100
Max. Operating Frequency
64 MHz
Cpu
Cortex-M3
# Of Touch Channels
39
Hardware Qtouch Acquisition
No
Max I/o Pins
79
Ext Interrupts
79
Usb Transceiver
1
Quadrature Decoder Channels
2
Usb Speed
Full Speed
Usb Interface
Device
Spi
3
Twi (i2c)
2
Uart
4
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
1000
Analog Comparators
1
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
48
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
6
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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10.23.5
• XN
Instruction access disable bit:
0 = instruction fetches enabled
1 = instruction fetches disabled.
• AP
Access permission field, see
• TEX, C, B
Memory access attributes, see
• S
Shareable bit, see
• SRD
Subregion disable bits. For each bit in this field:
0 = corresponding sub-region is enabled
1 = corresponding sub-region is disabled
See
Region sizes of 128 bytes and less do not support subregions. When writing the attributes for such a region, write the SRD
field as 0x00.
• SIZE
Specifies the size of the MPU protection region. The minimum permitted value is 3 (b00010), see See
on page 204
• ENABLE
6500C–ATARM–8-Feb-11
“Subregions” on page 208
31
23
15
7
MPU Region Attribute and Size Register
Reserved
Reserved
for more information.
Reserved
Table 10-36 on page
30
22
14
6
The RASR defines the region size and memory attributes of the MPU region specified by the
RNR, and enables that region and any subregions. See the register summary in
page 197
RASR is accessible using word or halfword accesses:
The bit assignments are:
• the most significant halfword holds the region attributes
• the least significant halfword holds the region size and the region and subregion enable bits.
Table 10-39 on page
Table 10-37 on page
for more information.
for its attributes.
29
21
13
5
204.
205.
TEX
XN
28
20
12
204.
4
SRD
Reserved
SIZE
27
19
11
3
26
18
10
S
2
AP
25
17
C
9
1
“SIZE field values”
Table 10-35 on
SAM3S
ENABLE
24
16
B
8
0
203
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