ASM330LXH datasheet(22/56 Pages) STMICROELECTRONICS

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ASM330LXH

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Figure 10. Stream mode

In the latter case reading all FIFO content before an overrun interrupt has occurred, the first

data read is equal to the last already read in the previous burst, so the number of new data

available in FIFO depends on the previous reading.

3.2.4

Dynamic Stream mode

In Dynamic Stream mode (FIFO_CTRL(FMODE2:0) = 110) after emptying the FIFO, the first

new sample that arrives becomes the first to be read in a subsequent read burst. In this way

the number of new data available in FIFO does not depend on the previous reading.

In Dynamic Stream mode FIFO_SRC(FSS5:0) is the number of new X, Y and Z samples

available in the FIFO buffer.

Stream Mode is intended to be used to read all 32 samples of FIFO within an ODR after

receiving an overrun signal.

Dynamic Stream is intended to be used to read FIFO_SRC(FSS5:0) samples when it is not

possible to guarantee reading data within an ODR.

Also, a FIFO threshold interrupt on the INT pad through INT_CTRL(INT_FTH) can be

enabled in order to read data from the FIFO and leave free memory slots for incoming data.

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