參數(shù)資料
型號(hào)： DS1689SN
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： Timer or RTC
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDSO28
封裝： 0.330 INCH, SOIC-28
文件頁數(shù)： 4/36頁
文件大?。?/td> 594K
代理商： DS1689SN
DS1689/DS1693
12 of 36
Table 2. 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
122.070
s
8.192kHz
0
1
0
244.141
s
4.096kHz
0
1
0
1
488.281
s
2.048kHz
0
1
0
976.5625
s
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
(See Note)
32.768kHz
Note: RS3–RS0 determine periodic interrupt rates as listed for E32K = 0.
The third method uses a periodic interrupt to determine if an update cycle is in progress. The UIP bit in
Register A is set high between the setting of the PF bit in Register C (see Figure 3). Periodic interrupts
that occur at a rate of greater than tBUC allow valid time and date information to be reached at each
occurrence of the periodic interrupt. The reads should be complete within (tPI / 2 + tBUC) to ensure that
data is not read during the update cycle.
Figure 3. Update-Ended and Periodic Interrupt Relationship
相關(guān)PDF資料
PDF描述
DS1689S 1 TIMER(S), REAL TIME CLOCK, PDSO28
DS1693 1 TIMER(S), REAL TIME CLOCK, PDMA28
DS1689 1 TIMER(S), REAL TIME CLOCK, PDIP28
DS1720S+T&R DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT
DS1720S+ DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1689SN/R 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Serialized Real-Time Clocks with NV RAM Control
DS1689SN/T 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Serialized Real-Time Clocks with NV RAM Control
DS1689SN/T&R 制造商:Maxim Integrated Products 功能描述:IC RTC SER NV RAM CTRL IN 28SOIC
DS1689SN/T&R 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1689SN+ 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
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