ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 1128
ATSAM3U-EK
Manufacturer Part Number
ATSAM3U-EK
Description
KIT EVAL FOR AT91SAM3U CORTEX
Manufacturer
Atmel
Type
MCUr
Datasheets
1.ATSAM3U-EK.pdf
(2 pages)
2.ATSAM3U-EK.pdf
(61 pages)
3.ATSAM3U-EK.pdf
(1171 pages)
4.ATSAM3U-EK.pdf
(53 pages)
Specifications of ATSAM3U-EK
Contents
Board
Processor To Be Evaluated
SAM3U
Data Bus Width
32 bit
Interface Type
RS-232, USB
Operating Supply Voltage
3 V
Silicon Manufacturer
Atmel
Core Architecture
ARM
Core Sub-architecture
Cortex - M3
Silicon Core Number
SAM3U4E
Silicon Family Name
SAM3U
Kit Contents
Board CD Docs
Rohs Compliant
Yes
For Use With/related Products
AT91SAM3U
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATSAM3U-EK
Manufacturer:
Atmel
Quantity:
10
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43.9.3.1
43.9.3.2
Table 43-46. SPI Timings
1128
Symbol
SPI
Master Write Mode
Master Read Mode
Slave Read Mode
Slave Write Mode
0
SAM3U Series
Maximum SPI Frequency
SPI Timings
Parameter
MISO Setup time before SPCK rises (master)
Figure 43-15. SPI Slave Mode with (CPOL = NCPHA = 0) or (CPOL= NCPHA= 1)
The following formulas give maximum SPI frequency in Master read and write modes and in
Slave read and write modes.
NPCS0
MISO
MOSI
SCK
The SPI is only sending data to a slave device such as an LCD, for example. The limit is
given by SPI
speed (see
pad.
T
DataFlash (AT45DB642D), T
In the formula above, F
In slave mode, SPCK is the input clock for the SPI. The max SPCK frequency is given by
setup and hold timings SPI
the pad limit, the limit in slave read mode is given by SPCK pad.
For 3.3V I/O domain and SPI6, F
before sampling data.
f
f
SPCK
SPCK
valid
is the slave time response to output data after detecting an SPCK edge. For Atmel SPI
Max
Max
=
=
Section 43.9.2 “I/O
2
SPI
--------------------------------------------------------
SPI
-------------------------------------------------------- -
SPI
(or SPI
15
0
6
(
(
orSPI
orSPI
5
) timing. Since it gives a maximum frequency above the maximum pad
SPCK
1
1
3
9
)
)
SPI
Max = 38.5 MHz @ VDDIO = 3.3V.
7
+
+
3.3V domain
1.8V domain
/SPI
valid
Conditions
T
T
9
valid
setup
Characteristics”), the max SPI frequency is the one from the
(orT
8
SPCK
(or SPI
SPI
v
Max = 33 MHz. T
10
) is 12 ns Max.
(1)
(2)
10
/SPI
11
SPI
). Since this gives a frequency well above
11
Min
14
17
setup
is the setup time from the master
Max
6430D–ATARM–25-Mar-11
SPI
Units
14
ns
ns
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