PCA2003_09 Datasheet, PDF (3/21 Pages) NXP Semiconductors – 32 kHz watch circuit with programmable adaptive motor pulse and pulse period

NXP Semiconductors
PCA2003
32 kHz watch circuit with programmable adaptive motor pulse
6. Pinning information
6.1 Pinning
PCA200xU
V_SS 1
8 RESET
i.c. 2
OSCIN 3
OSCOUT 4
x
0
0
y
7 MOT2
6 MOT1
5 V_DD
001aai177
Top view. For mechanical details, see Figure 13.
Fig 2. Pad configuration of PCA2003
6.2 Pin description
Table 2. Pin description
Symbol
Pin
Description
V_SS
1
i.c.
2
ground
internally connected
OSCIN
3
oscillator input
OSCOUT 4
oscillator output
V_DD
5
MOT1
6
supply voltage
motor 1 output
MOT2
7
motor 2 output
RESET
8
reset input
7. Functional description
7.1 Motor pulse
The motor output supplies pulses of different driving stages, depending on the torque
required to turn on the motor. The number of different stages can be selected between
three and six. With the exception of the highest driving stage, each motor pulse (t_p in
Figure 3 and Figure 6) is followed by a detection phase during which the motor movement
is monitored, in order to check whether the motor has turned correctly or not.
PCA2003_2
Product data sheet
Rev. 02 — 21 July 2009
© NXP B.V. 2009. All rights reserved.
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