LSM320HAY30 datasheet(33/42 Pages) STMICROELECTRONICS

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LSM320HAY30

Doc ID 16917 Rev 1

33/42

By setting the TurnOn[1:0] bits to 11, the “sleep-to-wake” function is enabled. When an

interrupt event occurs, the device is goes into normal mode, increasing the ODR to the value

defined in LA_CTRL_REG1. Although the device is in normal mode, LA_CTRL_REG1

content is not automatically changed to “normal mode” configuration.

8.7

LA_HP_FILTER_RESET (25h)

Dummy register. Reading at this address instantaneously zeroes 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 makes it possible to surmount the settling time of the high-pass filter.

8.8

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 FDS, HPen2, or HPen1 bit is equal to ‘1’) and HPM

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

8.9

LA_STATUS_REG (27h)

Table 32.

REFERENCE register

Ref7

Ref6

Ref5

Ref4

Ref3

Ref2

Ref1

Ref0

Table 33.

REFERENCE description

Ref7 - Ref0

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

Table 34.

LA_STATUS_REG register

ZYXOR

ZOR

YOR

XOR

ZYXDA

ZDA

YDA

XDA

Table 35.

LA_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 one 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 one)

YOR

Y axis data overrun. Default value: 0

(0: no overrun has occurred;

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

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