SAM3N2C Atmel Corporation, SAM3N2C Datasheet - Page 721
SAM3N2C
Manufacturer Part Number
SAM3N2C
Description
Manufacturer
Atmel Corporation
Specifications of SAM3N2C
Flash (kbytes)
128 Kbytes
Pin Count
100
Max. Operating Frequency
48 MHz
Cpu
Cortex-M3
# Of Touch Channels
23
Hardware Qtouch Acquisition
No
Max I/o Pins
47
Ext Interrupts
47
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
16
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)
16
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
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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35.8.3.1
11011A–ATARM–04-Oct-10
Master Write Mode
Master Read Mode
Slave Read Mode
Slave Write Mode
Maximum SPI Frequency
Figure 35-15. SPI Slave Mode with (CPOL = NCPHA = 0) or (CPOL = NCPHA = 1)
NPCS0
SPCK
MISO
MOSI
The following formulas give maximum SPI frequency in Master read and write modes and in
Slave read and write modes.
The SPI is only sending data to a slave device such as an LCD, for example. The limit is
given by SPI
speed (see
pad.
T
DataFlash (AT45DB642D), T
In the formula above, F
In slave mode, SPCK is the input clock for the SPI. The max SPCK frequency is given by
setup and hold timings SPI
the pad limit, the limit in slave read mode is given by SPCK pad.
For 3.3V I/O domain and SPI6, F
before sampling data.
f
SPCK
f
valid
SPCK
is the slave time response to output data after deleting an SPCK edge. For Atmel SPI
Max
Max
=
Section 35.8.2 “I/O
=
2
---------------------------------------------------------------------
2x S ( PI
SPI
(or SPI
--------------------------------------------------------
SPI
14
0
(
orSPI
5
6
) timing. Since it gives a maximum frequency above the maximum pad
(
orSPI
SPCK
1
3
1
SPI
)
Max = 38.0 MHz @ VDDIO = 3.3V.
7
/SPI
+
valid
9
9
)
T
Characteristics”), the max SPI frequency is the one from the
+
valid
(or T
8
SPCK
T
(or SPI
setup
SPI
Max = 32 MHz. T
v
10
) is 12 ns Max.
)
10
/SPI
11
SPI
). Since this gives a frequency well above
11
setup
is the setup time from the master
SAM3N
SPI
15
721
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