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M95128 Datenblatt(PDF) 24 Page - STMicroelectronics

Teilenummer M95128
Bauteilbeschribung  128 Kbit Serial SPI bus EEPROM with high speed clock
PDF  41 Pages
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M95128 Datenblatt(HTML) 24 Page - STMicroelectronics

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Connecting to the SPI bus
M95128, M95128-W, M95128-R
24/41
7.1
SPI modes
These devices can be driven by a microcontroller with its SPI peripheral running in either of
the two 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 13, 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 13.
SPI modes supported
AI01438B
C
MSB
CPHA
D
0
1
CPOL
0
1
Q
C
MSB



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