FNM alpha SM 230, Руководство пользователя, Страница: 18 / 72

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Description of device-specific features
alpha WSN SM 230
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Fig.: Functional elements SM 230
Description of the interfaces
I
2
C (optional)
The sensor module SM 230 works as I
2
C-Master with a clock speed of approx. 270 Kbit/s.
Addresses with a length of 7 bit are supported. The I
2
C-packets that are sent to the
sensor module SM 230 are outputted over the interface and the I
2
C-packets that are
entered at the interface are passed on from the sensor module SM 230 to the base
module. A special message is used for this (also see chapter "Command overview").
SPI (optional)
The sensor module SM 230 works as SPI-Master in mode 0 (4-wire) and with a clock
speed of approx. 300 Kbit/s. Addresses with a length of 8 bit are supported and the
data is each taken over at rising slope. The SPI-packets that are sent to the sensor
module SM 230 are outputtet over the interface and the SPI-packets that are read in
at the interface are passed on from the sensor module SM 230 to the base module.
A special message is used for this (also see chapter "Command overviews").