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DS17885 数据表(PDF) 14 Page - Dallas Semiconductor

部件名 DS17885
功能描述  3V/5V Real-Time Clock
PDF  38 Pages
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制造商  DALLAS [Dallas Semiconductor]
网页  https://www.maximintegrated.com/en.html
标志 DALLAS - Dallas Semiconductor

DS17885 数据表(HTML) 14 Page - Dallas Semiconductor

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Table 2. PERIODIC INTERRUPT RATE AND SQUARE-WAVE OUTPUT
FREQUENCY
EXTENDED
REGISTER B
SELECT BITS REGISTER A
E32k
RS3
RS2
RS1
RS0
tPI PERIODIC
INTERRUPT RATE
SQW OUTPUT
FREQUENCY
0
0
0
0
0
None
None
0
0
0
0
1
3.90625ms
256Hz
0
0
0
1
0
7.8125ms
128Hz
0
0
0
1
1
122.070µs
8.192kHz
0
0
1
0
0
244.141µs
4.096kHz
0
0
1
0
1
488.281µs
2.048kHz
0
0
1
1
0
976.5625µs
1.024kHz
0
0
1
1
1
1.953125ms
512Hz
0
1
0
0
0
3.90625ms
256Hz
0
1
0
0
1
7.8125ms
128Hz
0
1
0
1
0
15.625ms
64Hz
0
1
0
1
1
31.25ms
32Hz
0
1
1
0
0
62.5ms
16Hz
0
1
1
0
1
125ms
8Hz
0
1
1
1
0
250ms
4Hz
0
1
1
1
1
500ms
2Hz
1
X
X
X
X
*
32.768kHz
*RS3 to RS0 determine periodic interrupt rates as listed for E32k = 0.



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