SAM9263 Atmel Corporation, SAM9263 Datasheet - Page 657
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SAM9263
Manufacturer Part Number
SAM9263
Description
Manufacturer
Atmel Corporation
Datasheets
1.M40800.pdf
(284 pages)
2.M40800.pdf
(153 pages)
3.SAM9260.pdf
(290 pages)
4.SAM9261.pdf
(248 pages)
5.SAM9263.pdf
(1109 pages)
6.SAM9263.pdf
(51 pages)
Specifications of SAM9263
Flash (kbytes)
0 Kbytes
Pin Count
324
Max. Operating Frequency
240 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
160
Ext Interrupts
160
Usb Transceiver
3
Usb Speed
Full Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
1
Uart
4
Can
1
Ssc
2
Ethernet
1
Sd / Emmc
2
Graphic Lcd
Yes
Video Decoder
No
Camera Interface
Yes
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
96
Self Program Memory
NO
External Bus Interface
2
Dram Memory
sdram
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Fpu
No
Mpu / Mmu
No / Yes
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
- M40800 PDF datasheet
- M40800 PDF datasheet #2
- SAM9260 PDF datasheet #3
- SAM9261 PDF datasheet #4
- SAM9263 PDF datasheet #5
- SAM9263 PDF datasheet #6
- Current page: 657 of 1109
- Download datasheet (17Mb)
Figure 37-5. CAN Bit Timing
6249I–ATARM–3-Oct-11
CAN Clock
MCK
SYNC_
t
CSC
SEG
The SAMPLE POINT is the point in time at which the bus level is read and interpreted as the
value of that respective bit. Its location is at the end of PHASE_SEG1.
The ReSynchronization Jump Width defines the limit to the amount of lengthening or shortening
of the Phase Segments.
SJW is programmable to be the minimum of PHASE SEG1 and 4 TQ.
If the SMP field in the CAN_BR register is set, then the incoming bit stream is sampled three
times with a period of half a CAN clock period, centered on sample point.
In the CAN controller, the length of a bit on the CAN bus is determined by the parameters (BRP,
PROPAG, PHASE1 and PHASE2).
The time quantum is calculated as follows:
Note: The BRP field must be within the range [1, 0x7F], i.e., BRP = 0 is not authorized.
To compensate for phase shifts between clock oscillators of different controllers on the bus, the
CAN controller must resynchronize on any relevant signal edge of the current transmission. The
resynchronization shortens or lengthens the bit time so that the position of the sample point is
shifted with regard to the detected edge. The resynchronization jump width (SJW) defines the
maximum of time by which a bit period may be shortened or lengthened by resynchronization.
Example of bit timing determination for CAN baudrate of 500 Kbit/s:
PROP_SEG
• SJW: ReSynchronization Jump Width.
t
PRS
MCK = 48MHz
CAN baudrate= 500kbit/s => bit time= 2us
t
t
BIT
CSC
t
t
t
PRS
PHS2
PHS1
t
SJW
=
=
=
t
CSC
=
=
(
=
BRP
t
CSC
NOMINAL BIT TIME
t
t
t
CSC
CSC
CSC
PHASE_SEG1
+
t
×
+
PRS
×
×
×
t
1
(
PHS1
PROPAG
)
(
(
(
PHASE2
SJW
PHASE1
⁄
+
t
MCK
PHS1
+
1
+
)
+
+
+
t
1
PHS2
1
1
)
)
)
Sample Point
PHASE_SEG2
AT91SAM9263
t
PHS2
Transmission Point
657
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