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VD5377 Scheda tecnica(PDF) 23 Page - STMicroelectronics

Il numero della parte VD5377
Spiegazioni elettronici  Ultra-low power motion sensor for optical finger navigation (OFN)
PDF  88 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VD5377 Scheda tecnica(HTML) 23 Page - STMicroelectronics

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VD5377
System overview
Figure 10. Automatic power mode timing diagram (use_standby_pin=1)
Key timing parameters are shown in Table 11.
VTop
DVDD/AVDD
POR
Osc
48 MHz
POWERDOWN (I)
System States Power Up
SW STDBY
AUTO
SLEEP1
POWERDOWN
Power Up
STANDBY (I)
MOTION (O)
I2C (I/O)
MCU BOOT
RUNNING
state
state
host_config_done
Power Up
MCU BOOT
Device Ready
Osc
50 kHz
RunningTimeout Sleep1Latency
1 frame wake-up
duration
motion read
motion detected
through I2C
with STANDBY
as Chip Select
t1
t3
t2
t4
Table 11. Automatic mode timing constraints
Symbol
Parameter
Typical
t1
POR Delay
(POR threshold = 1.4 V typ)
20 µs
t2
Clock Startup
1 µs
t3
MCU boot time
450 µs
t4
Minimum Powerdown time
10 ms



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