PCA2003_1

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 01 — 15 December 2008

3 of 21

NXP Semiconductors

PCA2003

32 kHz watch circuit with programmable adaptive motor pulse

6.

Pinning information

6.1 Pinning

6.2 Pin description

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

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.

Top view. For mechanical details, see Figure 13.

Fig 2.

Pad configuration of PCA2003

001aai177

PCA200xU

1

8

RESET

2

i.c.

7

MOT2

3

OSCIN

6

MOT1

4

OSCOUT

5

x

y

0

0

Table 2.

Pin description

Symbol

Pin

Description

1

ground

i.c.

2

internally connected

OSCIN

3

oscillator input

OSCOUT

4

oscillator output

5

supply voltage

MOT1

6

motor 1 output

MOT2

7

motor 2 output

RESET

8

reset input