SAM9G46 Atmel Corporation, SAM9G46 Datasheet - Page 844
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SAM9G46
Manufacturer Part Number
SAM9G46
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(248 pages)
2.SAM9261.pdf
(1274 pages)
3.SAM9261.pdf
(43 pages)
4.SAM9G46.pdf
(58 pages)
Specifications of SAM9G46
Flash (kbytes)
0 Kbytes
Pin Count
324
Max. Operating Frequency
400 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
160
Ext Interrupts
160
Usb Transceiver
3
Usb Speed
Hi-Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
2
Uart
5
Lin
4
Ssc
2
Ethernet
1
Sd / Emmc
2
Graphic Lcd
Yes
Video Decoder
No
Camera Interface
Yes
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
440
Resistive Touch Screen
Yes
Temp. Sensor
No
Crypto Engine
AES/DES
Sram (kbytes)
64
Self Program Memory
NO
External Bus Interface
2
Dram Memory
DDR2/LPDDR, SDRAM/LPSDR
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
0.9 to 1.1
Fpu
No
Mpu / Mmu
No/Yes
Timers
6
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
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SAM9G35
SAM9G35
The following formula is used to compute the deviation of the slave bit rate relative to the master
bit rate after synchronization (F
F
LIN Standard imposes that it must not exceed ±15%. The LIN Standard imposes also that for
communication between two nodes, their bit rate must not differ by more than ±2%. This means
that the Baudrate_deviation must not exceed ±1%.
It follows from that, a minimum value for the nominal clock frequency:
Examples:
TOL_UNSYNCH
• The Baud Rate
• The oversampling (Over=0 => 16X or Over=0 => 8X)
• Baudrate = 20 kbit/s, Over=0 (Oversampling 16X) => F
• Baudrate = 20 kbit/s, Over=1 (Oversampling 8X) => F
• Baudrate = 1 kbit/s, Over=0 (Oversampling 16X) => F
• Baudrate = 1 kbit/s, Over=1 (Oversampling 8X) => F
is the deviation of the real slave node clock from the nominal clock frequency. The
Baudrate_deviation
Baudrate_deviation
F
NOM
min
=
100
SLAVE
=
=
----------------------------------------------------------------------------------------------- - Hz
is the real slave node clock frequency).
0.5
100
100
–
0.5
8
-------------------------------------------------------------------------------------------- - %
-------------------------------------------------------------------------------------------- - %
8
2 Over
8
–
+0.5
8
8
–
--------- -
100
15
F
-------------------------------------- - xF
2 Over
2 Over
+
TOL_UNSYNCH
Nom
–
–
1
8
Nom
Nom
-1
+
Nom
100
(min) = 74 kHz
1
(min) = 1.47 MHz
(min) = 132 kHz
F
1%
(min) = 2.64 MHz
SLAVE
Baudrate
+
+
+1
Baudrate
Baudrate
Nom
11053B–ATARM–22-Sep-11
11053B–ATARM–22-Sep-11
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