PCA1461U Datasheet, PDF (9/24 Pages) NXP Semiconductors – 32 kHz watch circuits with adaptive motor pulse

Philips Semiconductors
32 kHz watch circuits with adaptive motor
pulse
Product specification
PCA146x series
I _{M1 - M2}
MOTOR PULSE
part 1
DETECTION PHASE
part 2
detection criterion
is satisfied
t _DS
tP
t _DI
tD
Fig.6 Typical current waveform of a successfully executed motor pulse.
t
MSA944
MOTOR
PULSE
DETECTION PHASE
VM1 _{- M2}
tP
VM1
tM1 = 244 µs
t _M3 t _M4 t _M1
t _DS
t _DI
t _M2 = 61 µs
tMC = 488 µs
t _M2 = 61 µs
tD
current polarity
not measured
detection
criterion is
satisfied
t _DS
t _DI
t _M2 = 61 µs
t _M1 = 244 µs
tMC = 488 µs
t _M1 = 244 µs
t _M2 = 61 µs
MSA945
Fig.7 Detection phase of the current waveform in Fig.6.
1998 Apr 21
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