參數(shù)資料
型號(hào): DS17287-5
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: Timer or RTC
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDIP24
封裝: 0.720 INCH, ENCAPSULATED, DIP-24
文件頁數(shù): 7/35頁
文件大?。?/td> 662K
代理商: DS17287-5
Bits 3 to 0: Rate Selector Bits (RS3 to RS0). These
four rate-selection bits select one of the 13 taps on the
15-stage divider or disable the divider output. The tap
selected can be used to generate an output square
wave (SQW pin) and/or a periodic interrupt. The user
can do one of the following:
1) Enable the interrupt with the PIE bit;
2) Enable the SQW output pin with the SQWE or E32k
bits;
3) Enable both at the same time and the same rate; or
4) Enable neither.
Table 4 lists the periodic interrupt rates and the square-
wave frequencies that can be chosen with the RS bits.
DS17285/DS17287/DS17485/DS17487/DS17885/DS17887
Real-Time Clocks
____________________________________________________________________
15
Table 4. Periodic Interrupt Rate and Square-Wave Output Frequency
EXT REG B
SELECT BITS REGISTER A
E32K
RS3
RS2
RS1
RS0
tPI PERIODIC INTERRUPT
RATE
SQW OUTPUT FREQUENCY
0
None
0
1
3.90625ms
256Hz
0
1
0
7.8125ms
128Hz
0
1
122.070s
8.192kHz
0
1
0
244.141s
4.096kHz
0
1
0
1
488.281s
2.048kHz
0
1
0
976.5625s
1.024kHz
0
1
1.953125ms
512Hz
0
1
0
3.90625ms
256Hz
0
1
0
1
7.8125ms
128Hz
0
1
0
1
0
15.625ms
64Hz
0
1
0
1
31.25ms
32Hz
0
1
0
62.5ms
16Hz
0
1
0
1
125ms
8Hz
0
1
0
250ms
4Hz
0
1
500ms
2Hz
1
X
*
32.768kHz
*RS3 to RS0 determine periodic interrupt rates as listed for E32K = 0.
相關(guān)PDF資料
PDF描述
DS17285-5 1 TIMER(S), REAL TIME CLOCK, PDIP24
DS17285SN-3 1 TIMER(S), REAL TIME CLOCK, PDSO24
DS17885S-3 1 TIMER(S), REAL TIME CLOCK, PDSO24
DS17885E-3 1 TIMER(S), REAL TIME CLOCK, PDSO28
DS17285-3 1 TIMER(S), REAL TIME CLOCK, PDIP24
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