SAM3N1B Atmel Corporation, SAM3N1B Datasheet - Page 294
SAM3N1B
Manufacturer Part Number
SAM3N1B
Description
Manufacturer
Atmel Corporation
Specifications of SAM3N1B
Flash (kbytes)
64 Kbytes
Pin Count
64
Max. Operating Frequency
48 MHz
Cpu
Cortex-M3
# Of Touch Channels
17
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Quadrature Decoder Channels
2
Usb Speed
No
Usb Interface
No
Spi
3
Twi (i2c)
2
Uart
4
Ssc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
10
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
8
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
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
no / no
Timers
6
Output Compare Channels
6
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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19.2.3
19.2.4
19.2.4.1
294
SAM3N
Entering Programming Mode
Programmer Handshaking
Write Handshaking
The following algorithm puts the device in Parallel Programming Mode:
Note:
An handshake is defined for read and write operations. When the device is ready to start a new
operation (RDY signal set), the programmer starts the handshake by clearing the NCMD signal.
The handshaking is achieved once NCMD signal is high and RDY is high.
For details on the write handshaking sequence, refer to
Figure 19-3. SAM3NxB/C (64/100 pins) Parallel Programming Timing, Write Sequence
• Apply GND, VDDIO, VDDCORE and VDDPLL.
• Apply XIN clock within T
• Wait for T
• Start a read or write handshaking.
After reset, the device is clocked by the internal RC oscillator. Before clearing RDY signal, if an
external clock ( > 32 kHz) is connected to XIN, then the device switches on the external clock.
Else, XIN input is not considered. A higher frequency on XIN speeds up the programmer
handshake.
MODE[3:0]
DATA[7:0]
POR_RESET
NVALID
NCMD
NOE
RDY
1
2
POR_RESET
3
if an external clock is available.
Figure 19-3 Figure 19-4
4
5
11011A–ATARM–04-Oct-10
and
Table
19-4.
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