M52957AFP Datasheet, PDF (10/14 Pages) Hitachi Semiconductor – Distance Detection Signal Processing for 3V Supply Voltage

M52957AFP
a. CINT rapid charge
After reset is canceled, the capacity of CINT is charged rapidly until INT terminal first falls.
b. CH rapid charge
After reset is canceled, the capacity of CH is charged rapidly until INT terminal first rises and falls.
c. Stationary light hold
After reset is canceled, holds the stationary light while HOLD terminal is HIGH.
d. The first integration
After reset is canceled, as HOLD terminal is HIGH and INT terminal is HIGH, the first integration is
implemented while INT terminal is HIGH. Therefore, the first integration must be finished(INT terminal
from HIGH to LOW) until stationary light hold will be completed (HOLD terminal from HIGH to LOW)
e. The second integration
After reset is canceled, the second integration is implemented as HOLD terminal is LOW and INT terminal
is HIGH. And, the second integration is completed by exceeding judgment level of CINT terminal although
INT terminal is HIGH.
(5)SOUT
When the second integration starts, This terminal becomes from HIGH to LOW.
If CINT terminal exceeds judge level or INT terminal becomes from HIGH to LOW, this terminal becomes from LOW
to HIGH.
(notice)As the signal from microcomputer, the signal that controls IRED ON/OFF is required except for above
mentioned control signals. But applying the timing of HOLD is available.
Rev.1.0, Sep.19.2003, page 10 of 13