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M95128-R Scheda tecnica(PDF) 7 Page - STMicroelectronics

Il numero della parte M95128-R
Spiegazioni elettronici  128-Kbit serial SPI bus EEPROM with high-speed clock
PDF  48 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M95128-R Scheda tecnica(HTML) 7 Page - STMicroelectronics

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4.1
SPI modes
These devices can be driven by a microcontroller with its SPI peripheral running in either of the following two
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 6. 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 6. SPI modes supported
MSB
MSB
C
D
Q
C
CPOL
0
1
CPHA
0
1
M95128-W M95128-R M95128-DF
SPI modes
DS1356 - Rev 20
page 7/48



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