參數(shù)資料
型號: PCA2002U/AB/1,026
廠商: NXP Semiconductors
文件頁數(shù): 28/30頁
文件大?。?/td> 0K
描述: IC WATCH CIRCUIT 32KHZ DIE
標(biāo)準(zhǔn)包裝: 3,600
系列: *
PCA2002
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 8 — 25 November 2011
7 of 30
NXP Semiconductors
PCA2002
32 kHz watch circuit with programmable output period and pulse width
8.5 Type recognition
Byte D is read to determine, which type of the PCA200x family is used in a particular
application.
Table 6.
Description of word A bits
Bit
Value
Description
Inhibit time
1 to 7
-
adjust the number of the 8192 Hz pulses to be removed;
bit 1 is the MSB and bit 7 is the LSB
Calibration period
80
1 minute
12 minutes
Table 7.
Description of word B bits
Bit
Value
Description
Pulse width tp (ms)
1 to 3
000
0.98
001
1.95
010
2.9
011
3.9
100
4.9
101
5.9
110
6.8
111
7.8
Output period (s)
4to6
000
1
001
5
010
10
011
20
100
30
Duty cycle of motor pulse
70
75 %
1100 %
Pulse stretching
8
0
no pulse stretching
1
a pulse width of 2
t
p and a duty factor of 25 % are added
Table 8.
Description of word D bits
Bit
Value
Description
Type recognition
1 to 4
0000
PCA2002
1000
PCA2000
0100
PCA2001
1100
PCA2003
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