MC3410 Datasheet, PDF (24/75 Pages) NXP Semiconductors – 10-Bit high-speed multiplying D/A converter

MC3410 3-Axis Accelerometer
Datasheet
8.4 EVENT DETECTION
The detection logic monitors and compares sensor outputs against the comparisons selected
by the application software. Each type of event can be masked by a separate bit in the INTEN:
Interrupt Enable Register. The following table shows how the detection events are evaluated.
Event
Up
Down
Right
X Axis
|Z| < (UD_Z_TH) and
|X| > (UD_X_TH) and
X<0¹
|Z| < (UD_Z_TH) and
|X| > (UD_X_TH) and
X>0¹
Left
Front
Back
SHAKED ⁴
DROPD ⁵
TAPD ⁶
|X| > 1.3g ± SHAKE_TH
|X| < 0.5g ± DROP_TH
|X| > TAP_TH
Table 12. Detection Logic Event Evaluation
Y Axis
|Z| < (RL_Z_TH) and
|Y| > (RL_Y_TH) and
Y<0²
|Z| < (RL_Z_TH) and
|Y| > (RL_Y_TH) and
Y>0²
|Y| > 1.3g ± SHAKE_TH
|Y| < 0.5g ± DROP_TH
|Y| > TAP_TH
Z Axis
Z > FB_Z_TH ³
Z < -1 * FB_Z_TH ³
|Z| > 1.3g ± SHAKE_TH
|Z| < 0.5g ± DROP_TH
|Z| > TAP_TH
1 _{Up/Down Z threshold is programmable from 0.425g to 1.172g, up/down X threshold is programmable from |X| to}
|X| + 0.747g.
2 _{Right/left Z threshold is programmable from 0.425g to 1.172g, right/left Y threshold is programmable from |Y| to}
|Y| + 0.747g.
3 _{Front/back Z threshold is programmable from 0.174g to 0.547g.}
4 _{SHAKED event is triggered when any axis > SHAKE_TH, programmable from 0.925g to 1.1672g.}
5 _{DROPD event is triggered when condition (a) |X| + |Y| + |Z| < 0.5g + DROP_TH or condition (b) |X| < 0.5g ±}
DROP_TH and |Y| < 0.5g ± DROP_TH and |Z| < 0.5g ± DROP_TH, this is user selectable. The range is from
0.125g to 0.872g.
6 _{TAPD event is triggered by |X| > TAP_TH or |Y| > TAP_TH g or |Z| > TAP_TH, where TAP_TH is programmable}
and any combination of X, Y, and Z may be selected.
mCube Proprietary.
APS-048-0010v2.2
© 2014 mCube Inc. All rights reserved.
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