lis3dsh STMicroelectronics, lis3dsh Datasheet - Page 20

• Manufacturer Part Number: lis3dsh
• Description: Mems Digital Output Motion Sensor Ultra Low-power High Performance Three-axis “nano” Accelerometer
• Manufacturer: STMicroelectronics

Digital main blocks
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5.1
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Digital main blocks
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:
●
●
●
Table 8.
OUTPUT/STOP/CONTINUE
Code and parameters are loaded by the host into dedicated memory areas for the state
program
State program with timing based on ODR or decimated time
Possibility of conditional branches
next
next
next
LIS3DSH state machines: sequence of state to execute an algorithm
State 1
State n
START
State 2
State 3
reset
reset
reset
reset
Doc ID 022405 Rev 1
INT set
LIS3DSH
AM10212V1