SAM3S1C Atmel Corporation, SAM3S1C Datasheet - Page 293
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SAM3S1C
Manufacturer Part Number
SAM3S1C
Description
Manufacturer
Atmel Corporation
Specifications of SAM3S1C
Flash (kbytes)
64 Kbytes
Pin Count
100
Max. Operating Frequency
64 MHz
Cpu
Cortex-M3
# Of Touch Channels
39
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
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)
16
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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18.3.2
18.3.2.1
18.3.2.2
Figure 18-2. Code Read Optimization for FWS = 0
Note:
6500C–ATARM–8-Feb-11
Buffer 0 (128bits)
Buffer 1 (128bits)
ARM Request
Data To ARM
Flash Access
Master Clock
When FWS is equal to 0, all the accesses are performed in a single-cycle access.
(32-bit)
Read Operations
128-bit or 64-bit Access Mode
Code Read Optimization
@Byte 0
XXX
XXX
Bytes 0-15
An optimized controller manages embedded Flash reads, thus increasing performance when the
processor is running in Thumb2 mode by means of the 128- or 64- bit wide memory interface.
The Flash memory is accessible through 8-, 16- and 32-bit reads.
As the Flash block size is smaller than the address space reserved for the internal memory area,
the embedded Flash wraps around the address space and appears to be repeated within it.
The read operations can be performed with or without wait states. Wait states must be pro-
grammed in the field FWS (Flash Read Wait State) in the Flash Mode Register (EEFC_FMR).
Defining FWS to be 0 enables the single-cycle access of the embedded Flash. Refer to the Elec-
trical Characteristics for more details.
By default the read accesses of the Flash are performed through a 128-bit wide memory inter-
face. It enables better system performance especially when 2 or 3 wait state needed.
For systems requiring only 1 wait state, or to privilege current consumption rather than perfor-
mance, the user can select a 64-bit wide memory access via the FAM bit in the Flash Mode
Register (EEFC_FMR)
Please refer to the electrical characteristics section of the product datasheet for more details.
A system of 2 x 128-bit or 2 x 64-bit buffers is added in order to optimize sequential Code Fetch.
Note:
@Byte 4
Bytes 0-3
XXX
Immediate consecutive code read accesses are not mandatory to benefit from this optimization.
Bytes 16-31
@Byte 8
Bytes 4-7
@Byte 12
Bytes 8-11
Bytes 0-15
@Byte 16
Bytes 12-15
Bytes 32-47
@Byte 20
Bytes 16-19
Bytes 16-31
@Byte 24
Bytes 20-23
Bytes 24-27
@Byte 28
Bytes 32-47
SAM3S
@Byte 32
Bytes 28-31
293
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