SAM3S4B Atmel Corporation, SAM3S4B Datasheet - Page 204

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SAM3S4B

Manufacturer Part Number
SAM3S4B
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of SAM3S4B

Flash (kbytes)
256 Kbytes
Pin Count
64
Max. Operating Frequency
64 MHz
Cpu
Cortex-M3
# Of Touch Channels
23
Hardware Qtouch Acquisition
No
Max I/o Pins
79
Ext Interrupts
79
Usb Transceiver
1
Quadrature Decoder Channels
1
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
10
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
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
Region enable bit.
For information about access permission, see
10.23.5.1
10.23.6
204
SAM3S
MPU access permission attributes
SIZE field values
The SIZE field defines the size of the MPU memory region specified by the RNR. as follows:
The smallest permitted region size is 32B, corresponding to a SIZE value of 4.
example SIZE values, with the corresponding region size and value of N in the RBAR.
Table 10-36. Example SIZE field values
1.
This section describes the MPU access permission attributes. The access permission bits, TEX,
C, B, S, AP, and XN, of the RASR, control access to the corresponding memory region. If an
access is made to an area of memory without the required permissions, then the MPU generates
a permission fault.
Table 10-37
Table 10-37. TEX, C, B, and S encoding
SIZE value
b00100 (4)
b01001 (9)
b10011 (19)
b11101 (29)
b11111 (31)
TEX
b000
In the RBAR, see
(Region size in bytes) = 2
C
0
1
page
shows the encodings for the TEX, C, B, and S access permission bits.
B
0
1
0
1
Region size
32B
1KB
1MB
1GB
4GB
202.
“MPU access permission attributes”
S
x
x
0
1
0
1
(1)
(1)
“MPU Region Base Address Register” on
Memory type
Strongly-
ordered
Device
Normal
Normal
Value of
N
5
10
20
30
b01100
(1)
(SIZE+1)
Shareability
Shareable
Shareable
Not
shareable
Shareable
Not
shareable
Shareable
Note
Minimum permitted
size
-
-
-
Maximum possible
size
.
Other attributes
-
-
Outer and inner write-through. No write
allocate.
Outer and inner write-back. No write
allocate.
6500C–ATARM–8-Feb-11
Table 10-36
gives

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