MMA7455L(2007) 查看數據表（PDF） - Freescale Semiconductor

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MMA7455L
(Rev.:2007)

±2g/±4g/±8g Three Axis Low-g Digital Output Accelerometer

Freescale Semiconductor 

PULSE DETECTION

G

Pulse Detection

Time duration

Gth

INT pin

Time

*Note there is up to

1.6ms delay on the

interrupt signal

Time

Single Pulse Detection ($19 PDPL=0 indicating motion detection)

Time Window for 2nd pulse $1E TW=0 indicating single pulse

G

Pulse Detection

Time Window

Pulse Detection Time Window for

2nd pulse

Gth

INT

Latency Time Window

(2nd pulse ignored here)

Time Window >0

for 2 pulse detect

*Note there is up to

1.6ms delay on the

interrupt signal

Double Pulse Detection ($19 PDPL=0 indicating motion detection)

Time Window for 2nd pulse $1E TW>0 indicating double pulse

Time

Time

Figure 4. Single Pulse Detection

Figure 5. Double Pulse Detection

Figure 6. Negative Pulse Detection

Sensors

Freescale Semiconductor

MMA7455L

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