2003 Dec 17

11

Philips Semiconductors

Product specification

32 kHz watch circuit with programmable

adaptive motor pulse

PCA2000; PCA2001

(1)

mgw357

Fig.8 Supply voltage modulation and corresponding supply current variation for reading word B.

(1)

∆I

DD

V

DD

30 k

Ω

----------------

=

Frequency tuning of assembled watch

Figure 9 shows the test set-up for frequency tuning the assembled watch.

handbook, full pagewidth

MGW568

FREQUENCY

COUNTER

PROGRAMMABLE

DC POWER SUPPLY

PC INTERFACE

PC

M

motor

32 kHz

PCA200x

battery

Fig.9 Frequency tuning at assembled watch.