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PCA1485U/7 Scheda tecnica(PDF) 8 Page - NXP Semiconductors

Il numero della parte PCA1485U/7
Spiegazioni elettronici  32 kHz oscillator, amplitude regulated with excellent frequency stability
PDF  20 Pages
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Produttore elettronici  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCA1485U/7 Scheda tecnica(HTML) 8 Page - NXP Semiconductors

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1998 Apr 21
8
Philips Semiconductors
Product specification
32 kHz watch circuits with adaptive motor
pulse
PCA148x series
Correction sequence (see Fig.7)
If a missing step is detected, a correction sequence is produced. This consists of a small pulse (tC1) which gives the motor
a defined position and after 29.30 ms a pulse of stage 6 (tC2) to turn the motor.
Fig.7 Correction sequence after a missing motor step with motor connected.
MSA943
MOTOR
PULSE
DETECTION
CORRECTION SEQUENCE
t P
t C1
t D
M1 - M2
V
= 977
µs
t C = 30.27 ms t P
t C2 =t P



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