7.12

FIFO_SRC (2Fh)

FIFO status register

FTH

OVRN

FSS5

FSS4

FSS3

FSS2

FSS1

FSS0

FTH

FIFO threshold status.

(0: FIFO filling is lower than threshold level; 1: FIFO filling is equal to or higher than the threshold level

OVRN

FIFO overrun status.

(0: FIFO is not completely filled; 1: FIFO is completely filled and at least one sample has been overwritten) For

further details refer to Table 26. FIFO_SRC example: OVR/FSS details.

FSS [5:0]

Number of unread samples stored in FIFO.

(000000: FIFO empty; 100000: FIFO full, 32 unread samples)

For further details refer to Table 26. FIFO_SRC example: OVR/FSS details.

FTH

OVRN

FSS5

FSS4

FSS3

FSS2

FSS1

FSS0

Description

0

0

0

0

0

0

0

0

FIFO empty

-- (1)

0

0

0

0

0

0

1

1 unread sample

...

--(1)

0

1

0

0

0

0

0

32 unread samples

0(1)

1

1

0

0

0

0

0

At least one sample has been overwritten

1. When the number of unread samples in FIFO is equal to or greater than the threshold level set in register FIFO_CTRL

(2Eh), the FTH value is ‘1’.

The FSS is the FIFO stored data level of the unread samples. When it is equal to FTH, all data available in FIFO

are read without additional read operations.

The INT output is high when the number of samples to read is equal to or greater than FTH.

IIS3DHHC

FIFO_SRC (2Fh)

DS12292 - Rev 3

page 23/30