SAM3S4B Atmel Corporation, SAM3S4B Datasheet - Page 54
SAM3S4B
Manufacturer Part Number
SAM3S4B
Description
Manufacturer
Atmel Corporation
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
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10.5
10.5.1
54
Memory model
SAM3S
Memory regions, types and attributes
This section describes the processor memory map, the behavior of memory accesses, and the
bit-banding features. The processor has a fixed memory map that provides up to 4GB of
addressable memory. The memory map is:
The regions for SRAM and peripherals include bit-band regions. Bit-banding provides atomic
operations to bit data, see
The processor reserves regions of the Private peripheral bus (PPB) address range for core
peripheral registers, see
This memory mapping is generic to ARM Cortex-M3 products. To get the specific memory map-
ping of this product, refer to the Memories section of the datasheet.
The memory map and the programming of the MPU split the memory map into regions. Each
region has a defined memory type, and some regions have additional memory attributes. The
memory type and attributes determine the behavior of accesses to the region.
The memory types are:
32MB
1MB
1MB
32MB
Bit band region
Bit band region
Bit band alias
Bit band alias
“About the Cortex-M3 peripherals” on page
“Bit-banding” on page
58.
Private peripheral
Vendor-specific
External device
External RAM
Peripheral
memory
SRAM
Code
bus
150.
511MB
1.0MB
1.0GB
1.0GB
0.5GB
0.5GB
0.5GB
6500C–ATARM–8-Feb-11
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