AT32UC3A3256 Atmel Corporation, AT32UC3A3256 Datasheet - Page 576

• Manufacturer Part Number: AT32UC3A3256
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A3256

• Flash (kbytes): 256 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 110
• Ext Interrupts: 110
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 16
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 128
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0 to 3.6
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 12
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

25.6.9.8
32072G–11/2011
Identifier Parity
The following formula is used to calculate synchronization deviation, where F
slave node clock frequency, and F
ing to the LIN specification, F
nodes must be within ±2% of each other, resulting in a maximal BaudRate_deviation of ±1%.
Minimum nominal clock frequency with a fractional part:
Examples:
If the fractional part is not used, the synchronization accuracy is much lower. The 16 most signif-
icant bits, added with the first least significant bit, becomes the new clock divider (CD). The
equation of the baud rate deviation is the same as above, but the constants are:
Minimum nominal clock frequency without a fractional part:
Examples:
An identifier field consists of two sub-fields; the identifier and its parity. Bits 0 to 5 are assigned
to the identifier, while bits 6 and 7 are assigned to parity. Automatic parity management is dis-
abled by writing a one to the Parity Disable bit in the LIN Mode register (LINMR.PARDIS).
• The oversampling mode (OVER=0 => 16x, or OVER=1 => 8x)
• Baud rate = 20 kbit/s, OVER=0 (Oversampling 16x) => F
• Baud rate = 20 kbit/s, OVER=1 (Oversampling 8x) => F
• Baud rate = 1 kbit/s, OVER=0 (Oversampling 16x) => F
• Baud rate = 1 kbit/s, OVER=1 (Oversampling 8x) => F
• Baud rate = 20 kbit/s, OVER=0 (Oversampling 16x) => F
• Baud rate = 20 kbit/s, OVER=1 (Oversampling 8x) => F
• Baud rate = 1 kbit/s, OVER=0 (Oversampling 16x) => F
• Baud rate = 1 kbit/s, OVER=1 (Oversampling 8x) => F
BaudRate_deviation
BaudRate_deviation
F
F
Nom
Nom
(
(
min
min
)
)
=
=
⎛
⎜
⎜
⎜
⎝
100
⎛
⎜
⎜
⎜
⎝
TOL_UNSYNCH
100
–
–
4
0,5
×
≤
[
---------------------------------------------------------------------------------------------- -
TOL_UNSYNC
×
4 8
α +4
≤
=
=
[
------------------------------------------------------------------------------------------------------ -
×
≤
0,5
α +0,5
⎛
⎝
⎛
⎜
⎜
⎜
⎝
100
100
≤
×
×
(
8
may not exceed ±15%, and the bit rates between two
2 OVER
8
×
–
×
×
-1 β +1
×
⎛
⎝
is the difference between F
α [
-------------------------------------------------------------------------------------------------- -
α [
-------------------------------------------------------------------------------------------------- -
–
--------- -
100
8
(
<
15
2 OVER
×
×
×
-1
–
<
⎛
⎝
+
8
8
–
--------- -
100
)
8
<
1
15
×
×
+
⎞
⎠
β
×
1
×
(
(
⎛
⎝
<
2 OVER
2 OVER
+
]
1%
F
----------------------------------- -
×
+1
–
–
1
)
TOL_UNSYNC
Nom
Nom
Baudrate
⎞
⎠
+
Nom
Nom
Nom
Nom
8
×
Nom
Nom
1
×
(min) = 74 kHz
(min) = 485 kHz
100
]
1%
(min) = 1.47 MHz
(min) = 132 kHz
(min) = 9.71 MHz
(min) = 956 kHz
F
×
(min) = 2.64 MHz
(min) = 19.12 MHz
SLAVE
BaudRate
)
)
⎞
⎟
⎟
⎟
⎠
+ ]
+ ]
Hz
β
β
⎞ xF
⎠
×
×
Nom
BaudRate
BaudRate
Nom
⎞
⎟
⎟
⎟
⎠
Hz
and F
SLAVE
SLAVE
⎞ %
⎠
⎞
⎟
⎟
⎟
⎠
%
is the real
Accord-
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