參數(shù)資料
型號(hào): DS17487N-3
英文描述: 3V/5V Real-Time Clock
中文描述: 3V/5V實(shí)時(shí)時(shí)鐘
文件頁(yè)數(shù): 14/38頁(yè)
文件大?。?/td> 427K
代理商: DS17487N-3
DS17485/DS17487
14 of 38
Table 2.
PERIODIC INTERRUPT RATE AND SQUARE-WAVE OUTPUT
FREQUENCY
EXTENDED
REGISTER B
SELECT BITS REGISTER A
E32k
0
RS3
0
RS2
0
RS1
0
RS0
0
t
PI
PERIODIC
INTERRUPT RATE
SQW OUTPUT
FREQUENCY
None
None
0
0
0
0
0
0
0
0
0
0
1
1
1
0
1
3.90625ms
7.8125ms
122.070μs
256Hz
128Hz
8.192kHz
0
0
0
0
0
0
1
1
1
0
0
1
0
1
0
244.141μs
488.281μs
976.5625μs
4.096kHz
2.048kHz
1.024kHz
0
0
0
0
1
1
1
0
0
1
0
0
1
0
1
1.953125ms
3.90625ms
7.8125ms
512Hz
256Hz
128Hz
0
0
0
1
1
1
0
0
1
1
1
0
0
1
0
15.625ms
31.25ms
62.5ms
64Hz
32Hz
16Hz
0
0
0
1
1
1
1
1
1
0
1
1
1
0
1
125ms
250ms
500ms
8Hz
4Hz
2Hz
1
X
X
X
X
*
32.768kHz
*RS3 to RS0 determine periodic interrupt rates as listed for E32k = 0.
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