Atmel SAM4L-EK Atmel ATSAM4L-EK ATSAM4L-EK Data Sheet
Product codes
ATSAM4L-EK
1168
42023E–SAM–07/2013
ATSAM4L8/L4/L2
The maximum SPI master output frequency is given by the following formula:
Where
is the MOSI delay, SPI2 or SPI5 depending on CPOL and NCPHA.
is the
maximum frequency of the SPI pins. refer to the I/O Pin Characteristics section for the maximum
frequency of the pins.
frequency of the pins.
Maximum SPI Frequency, Master Input
The maximum SPI master input frequency is given by the following formula:
Where
is the MISO setup and hold time, SPI0 + SPI1 or SPI3 + SPI4 depending on
CPOL and NCPHA.
is the SPI slave response time. refer to the SPI slave datasheet for
.
42.10.3.2
Slave mode
Figure 42-14. SPI Slave Mode with (CPOL= 0 and NCPHA= 1) or (CPOL= 1 and NCPHA= 0)
Figure 42-15. SPI Slave Mode with (CPOL= NCPHA= 0) or (CPOL= NCPHA= 1)
f
SPCKMAX
MIN f
PINMAX
1
SPIn
------------
(
,
)
=
SPIn
f
PINMAX
f
SPCKMAX
1
SPIn
t
VALID
+
------------------------------------
=
SPIn
t
VALID
t
VALID
SPI7
SPI8
MISO
SPCK
MOSI
SPI6
SPI10
SPI11
MISO
SPCK
MOSI
SPI9