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VD5377CB Datasheet(PDF) 20 Page - STMicroelectronics

Part # VD5377CB
Description  Ultra-low power motion sensor for optical finger navigation (OFN)
PDF  88 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VD5377CB Datasheet(HTML) 20 Page - STMicroelectronics

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System overview
VD5377
20/88
Doc ID 022952 Rev 2
POWERDOWN pin is deasserted, the internal 1.8 V regulator is re-enabled triggering a
POR (Power-On Reset) and the MCU re-initializes as at power-up before entering the SW
STBY state. The device must be re-configured after POWERDOWN.
Key timing parameters are shown in Table 9.
Table 9. Manual 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 (220 nF regulator capacitor)
10 ms
t5(1)
1. No I2C comms permitted to VD5377 after Standby pin asserted
Standby pin latency (up to 1 frame at 1 kf/s)
up to 1 ms



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