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
9