Datasheet ESRF-ESF

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9. SPI Interface

Master

MCU

CS

SCLK

MISO

MOSI

FLOW

ESRF-ESF sensors have the option of a serial peripheral interface communication following

the memory mapping as described in section 9. The sensor uses MODE 0 SPI with CPOL = 0

and CPHA = 0.

The SPI communication requires to send, via the MOSI signal, the address to read and then

the following clock pulses will produce the required result on the MISO line. The following

examples describe the SPI transactions for reading the flow and the temperature output of

the sensor.

0x00

DON T CARE

FLOW BYTE [0]

FLOW BYTE [1]

CS

SCLK

MOSI

MISO

0x01

DON T CARE

TEMPERATURE BYTE [0]

TEMPERATURE BYTE [1]

CS

SCLK

MOSI

MISO