SAM3S16C Atmel Corporation, SAM3S16C Datasheet - Page 381
SAM3S16C
Manufacturer Part Number
SAM3S16C
Description
Manufacturer
Atmel Corporation
Datasheet
1.SAM3S16C.pdf
(1130 pages)
Specifications of SAM3S16C
Flash (kbytes)
1024 Kbytes
Pin Count
100
Max. Operating Frequency
100 MHz
Cpu
Cortex-M3
# Of Touch Channels
39
Hardware Qtouch Acquisition
No
Max I/o Pins
79
Ext Interrupts
79
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)
128
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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25.10 Automatic Wait States
25.10.1
Figure 25-13. Chip Select Wait State between a Read Access on NCS0 and a Write Access on NCS2
25.10.2
11117B–ATARM–18-Oct-11
11117B–ATARM–18-Oct-11
Chip Select Wait States
Early Read Wait State
A[23:0]
D[7:0]
NCS0
NCS2
NWE
MCK
NRD
When multiple chip selects are handled, it is possible to configure the scrambling function per
chip select using the OCMS field in the SMC_OCMS registers.
Under certain circumstances, the SMC automatically inserts idle cycles between accesses to
avoid bus contention or operation conflict.
The SMC always inserts an idle cycle between 2 transfers on separate chip selects. This idle
cycle ensures that there is no bus contention between the de-activation of one device and the
activation of the next one.
During chip select wait state, all control lines are turned inactive: NWR, NCS[0..3], NRD lines are
all set to 1.
Figure 25-13
Select 2.
In some cases, the SMC inserts a wait state cycle between a write access and a read access to
allow time for the write cycle to end before the subsequent read cycle begins. This wait state is
not generated in addition to a chip select wait state. The early read cycle thus only occurs
between a write and read access to the same memory device (same chip select).
An early read wait state is automatically inserted if at least one of the following conditions is
valid:
illustrates a chip select wait state between access on Chip Select 0 and Chip
NRD_CYCLE
Read to Write
Wait State
Chip Select
Wait State
NWE_CYCLE
SAM3S16
SAM3S16
339
339
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