LPS225HB datasheet(42/47 Pages) STMICROELECTRONICS

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LPS225HB

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DocID030115 Rev 2

8.17

STATUS (27h)

Status register

Address:

27h (R)

Reset:

00h

[7:6] Reserved

[5] T_OR: Temperature data overrun. Default value: 0

(0: no overrun has occurred; 1: new data for temperature has overwritten the previous

data)

[4] P_OR: Pressure data overrun. Default value: 0

(0: no overrun has occurred; 1: new data for pressure has overwritten the previous

data)

[3:2] Reserved

[1] T_DA: Temperature data available. Default value: 0

(0: new data for temperature is not yet available; 1: new data for temperature is

available)

[0] P_DA: Pressure data available. Default value: 0

(0: new data for pressure is not yet available; 1: new data for pressure is available)

This register is updated every ODR cycle, regardless of the BDU value in CTRL_REG1

(10h).

T_OR is set to ‘1’ whenever new temperature data is available and T_DA was set in the

previous ODR cycle and not cleared. T_OR is cleared when TEMP_OUT_H (2Ch) is read.

P_OR is set to '1' whenever new pressure data is available and P_DA was set in the

previous ODR cycle and not cleared. P_OR is cleared when PRESS_OUT_H (2Ah) is read.

Table 21. FIFO_STATUS example: OVR/FSS details

FTH

OVRN

FSS5

FSS4

FSS3

FSS2

FSS1

FSS0

Description

FIFO empty

--(1)

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

(14h), the FTH value is ‘1’.

1 unread sample

...

--(1)

32 unread samples

At least one sample has

been overwritten

54321

RES

T_OR

P_OR

RES

T_DA

P_DA

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