PCA2002U/10AB/1,00 NXP Semiconductors, PCA2002U/10AB/1,00 Datasheet - Page 4

• Manufacturer Part Number: PCA2002U/10AB/1,00
• Manufacturer: NXP Semiconductors

Specifications of PCA2002U/10AB/1,00

• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
7. Functional description
PCA2002_6
Product data sheet
Fig 3.
chopped pulse
with stretching
with stretching
Motor output waveforms
full pulse
full pulse
chopped
pulse
7.1 Motor pulse
7.2 Time calibration
The motor driver delivers pulses with an alternating polarity. The output waveform across
the motor terminals is illustrated in
connected to V
The following parameters can be selected and are stored in a One Time Programmable
(OTP) memory:
The quartz crystal oscillator has an integrated capacitance of 5.2 pF, which is lower than
the specified capacitance (C
oscillator frequency is typically 60 ppm higher than 32.768 kHz. This positive frequency
offset is compensated by removing the appropriate number of 8192 Hz pulses in the
divider chain (maximum 127 pulses), every 1 or 2 minutes. The time correction is given in
Table
•
•
•
•
Output periods of 1 s, 5 s, 10 s, 20 s and 30 s
Pulse width (t
Full or chopped (75 %) output pulse
Pulse stretching: an enlargement pulse is added to the primary motor pulse. This
enlargement pulse has a duty cycle of 25 % and a width which is twice the
programmed motor pulse width.
t
p
3.
2t
32 kHz watch circuit with programmable output period and pulse width
p
DD
All information provided in this document is subject to legal disclaimers.
p
which means that the motor is short-circuit.
) between 0.98 ms and 7.8 ms in steps of 0.98 ms
period
Rev. 06 — 6 May 2010
L
) of 8.2 pF for the quartz crystal (see
Figure
3. Between the motor pulses, both terminals are
t
p
2t
p
Table
PCA2002
© NXP B.V. 2010. All rights reserved.
9). Therefore, the
mgu718
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