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M95040-DF Fiches technique(PDF) 12 Page - STMicroelectronics

No de pièce M95040-DF
Description  Compatible with SPI bus serial interface
PDF  46 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M95040-DF Fiches technique(HTML) 12 Page - STMicroelectronics

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Connecting to the SPI bus
M950x0-W M950x0-R M950x0-DF
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DocID6512 Rev 13
3.1
SPI modes
The device can be driven by a microcontroller with its SPI peripheral running in either of the
following modes:
•
CPOL=0, CPHA=0
•
CPOL=1, CPHA=1
For these two modes, input data is latched in on the rising edge of Serial Clock (C), and
output data is available from the falling edge of Serial Clock (C).
The difference between the two modes, as shown in Figure 4: SPI modes supported, is the
clock polarity when the bus master is in Stand-by mode and not transferring data:
•
C remains at 0 for (CPOL=0, CPHA=0)
•
C remains at 1 for (CPOL=1, CPHA=1)
Figure 4. SPI modes supported



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