SAM3S2A Atmel Corporation, SAM3S2A Datasheet - Page 374
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SAM3S2A
Manufacturer Part Number
SAM3S2A
Description
Manufacturer
Atmel Corporation
Specifications of SAM3S2A
Flash (kbytes)
128 Kbytes
Pin Count
48
Max. Operating Frequency
64 MHz
Cpu
Cortex-M3
# Of Touch Channels
17
Hardware Qtouch Acquisition
No
Max I/o Pins
47
Ext Interrupts
47
Usb Transceiver
1
Quadrature Decoder Channels
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
2
Uart
3
Ssc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
12
Adc Speed (ksps)
1000
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
32
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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23.8.4
23.8.4.1
23.8.4.2
374
SAM3S
Write Mode
Write is Controlled by NWE (WRITE_MODE = 1):
Write is Controlled by NCS (WRITE_MODE = 0)
The WRITE_MODE parameter in the SMC_MODE register of the corresponding chip select indi-
cates which signal controls the write operation.
Figure 23-11
put on the bus during the pulse and hold steps of the NWE signal. The internal data buffers are
turned out after the NWE_SETUP time, and until the end of the write cycle, regardless of the
programmed waveform on NCS.
Figure 23-11. WRITE_MODE = 1. The write operation is controlled by NWE
Figure 23-12
put on the bus during the pulse and hold steps of the NCS signal. The internal data buffers are
turned out after the NCS_WR_SETUP time, and until the end of the write cycle, regardless of
the programmed waveform on NWE.
Figure 23-12. WRITE_MODE = 0. The write operation is controlled by NCS
A [23:0]
A [23:0]
D[7:0]
D[7:0]
NWE
NWE
MCK
MCK
NCS
NCS
shows the waveforms of a write operation with WRITE_MODE set to 1. The data is
shows the waveforms of a write operation with WRITE_MODE set to 0. The data is
6500C–ATARM–8-Feb-11
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