PCA2001 datasheet(8/19 Pages) PHILIPS

8 / 19 page

2003 Dec 17

Philips Semiconductors

Product speciﬁcation

32 kHz watch circuit with programmable

adaptive motor pulse

PCA2000; PCA2001

Table 3

Description of word A bits

Table 4

Description of word B bits

Notes

1. Including the highest driving stage, which one has no

motor step detection.

2. If the maximum duty cycle of 75% is selected, not all

programming combinations are possible since the

second highest level must be smaller than the highest

driving level.

Table 5

Description of word C bits

Note

1. Between positive and negative detection pulses.

BIT

VALUE

DESCRIPTION

Inhibit time

1to7

−

Adjust the number of the 8192 Hz

pulses to be removed. Bit 1 is the

MSB and bit 7 is the LSB.

Calibration period

1 minute

2 minutes

BIT

VALUE

DESCRIPTION

Duty cycle lowest driving stage

1 to 2

37.5%

43.75%

50%

56.25%

Number of driving stages

3 to 4

6; note 1

Duty cycle highest driving stage

75%; note 2

100%

Stretching pulse

pulse is not stretched

pulse of 2tpr and duty cycle of 25%

is added

Factory test bits

7to8

−

BIT

VALUE

DESCRIPTION

Pulse width tpr (ms)

1 to 3

000

0.98

001

1.95

010

2.90

011

3.90

100

4.90

101

5.90

110

6.80

111

7.80

Time delay tmax (ms); note 1

4 to 6

000

3.91

001

4.88

010

5.86

011

6.84

100

7.81

101

8.79

110

9.77

111

10.74

EOL voltage of the battery

1.38 V (silver-oxide)

2.5 V (lithium)

Factory test bit

−

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