H3LIS331DL datasheet(29/38 Pages) STMICROELECTRONICS

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H3LIS331DL

7.7

HP_FILTER_RESET (25h)

Dummy register. Reading at this address zeroes instantaneously the content of the internal

high-pass filter. If the high-pass filter is enabled, all three axes are instantaneously set to

0 g. This allows the settling time of the high-pass filter to be overcome.

7.8

REFERENCE (26h)

This register sets the acceleration value taken as a reference for the high-pass filter output.

When the filter is turned on (at least one of the FDS, HPen2, or HPen1 bits is equal to ‘1’)

and the HPM bits are set to “01”, filter-out is generated, taking this value as a reference.

7.9

STATUS_REG (27h)

Table 33. REFERENCE register

Ref7

Ref6

Ref5

Ref4

Ref3

Ref2

Ref1

Ref0

Table 34. REFERENCE description

Ref7 - Ref0

Reference value for high-pass filter. Default value: 00h.

Table 35. STATUS_REG register

ZYXOR

ZOR

YOR

XOR

ZYXDA

ZDA

YDA

XDA

Table 36. STATUS_REG description

ZYXOR

X, Y and Z-axis data overrun. Default value: 0

(0: no overrun has occurred;

1: new data has overwritten the previous data before it was read)

ZOR

Z-axis data overrun. Default value: 0

(0: no overrun has occurred;

1: new data for the Z-axis has overwritten the previous data)

YOR

Y-axis data overrun. Default value: 0

(0: no overrun has occurred;

1: new data for the Y-axis has overwritten the previous data)

XOR

X-axis data overrun. Default value: 0

(0: no overrun has occurred;

1: new data for the X-axis has overwritten the previous data)

ZYXDA

X, Y and Z-axis new data available. Default value: 0

(0: a new set of data is not yet available; 1: a new set of data is available)

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