SAM9G15 Atmel Corporation, SAM9G15 Datasheet - Page 844

• Manufacturer Part Number: SAM9G15
• Manufacturer: Atmel Corporation

Specifications of SAM9G15

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 105
• Ext Interrupts: 105
• Usb Transceiver: 3
• Usb Speed: Hi-Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 3
• Uart: 6
• Lin: 4
• Ssc: 1
• Sd / Emmc: 2
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 440
• Resistive Touch Screen: Yes
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• 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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844
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