LIS3DSH datasheet(20/53 Pages) STMICROELECTRONICS

部件名	LIS3DSH

功能描述	MEMS digital output motion sensor ultra low-power high performance three-axis ?쐍ano??accelerometer

PDF	53 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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20 / 53 page

Digital main blocks

LIS3DSH

20/53

Doc ID 022405 Rev 1

Digital main blocks

5.1

State machine

The LIS3DSH embeds two state machines able to run a user defined program.

The program is made up of a set of instructions that define the transition to successive

states. Conditional branches are possible.

From each state (n) it is possible to have transition to the next state (n+1) or to reset state.

Transition to reset point happens when “RESET condition” is true; Transition to the next step

happens when “NEXT condition” is true.

Interrupt is triggered when output/stop/continue state is reached.

Each state machine allows to implement gesture recognition in a flexible way, free-fall,

wake-up, 4D/6D orientation, pulse counter and step recognition, click/double click,

shake/double shake, face-up/face-down, turn/double turn:

●

Code and parameters are loaded by the host into dedicated memory areas for the state

program

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State program with timing based on ODR or decimated time

●

Possibility of conditional branches

Table 8.

LIS3DSH state machines: sequence of state to execute an algorithm

State 1

State 2

State 3

State n

reset

START

OUTPUT/STOP/CONTINUE

INT set

AM10212V1

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