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L9663 Datasheet(PDF) 46 Page - STMicroelectronics

Part # L9663
Description  PSI5 Transceiver IC
PDF  104 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9663 Datasheet(HTML) 46 Page - STMicroelectronics

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Diagnosis
L9663
46/104
DocID028693 Rev 1
The sync pulses(i) are monitored for under voltage, duration and rising edge transient
speed. The circuit evaluates the output voltage versus internal sync trigger signal and sets
the corresponding bit(s) in Status Register 1 (SR1):
Bit SYNCx_SLOW if a delayed sync pulse or pulse with Vt2< 2.5V /3.5V was generated
(slow Vsync rising time)
Bit SYNCx_UV if the sync pulse amplitude goes below 2.5V/3.5V for a time longer than
the specified filtering time (spec parameter tAsync_V).
STB is detected by the over voltage monitoring (see Section 4.4).
i.
For sync pulse triggering via pin see errata n.1822, Section 7: Errata



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