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參數(shù)資料
| 型號： | DS1678S+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 10/25頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC REAL TIME EVENT REC 8-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 88 |
| 類型： | 時間事件記錄器 |
| 特點： | 警報器，閏年，NVSRAM，Y2K |
| 存儲容量： | 32B |
| 時間格式： | HH:MM:SS（12/24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | I²C，2 線串口 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 電壓 - 電源，電池： | 2.6 V ~ 3.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1434 (CN2011-ZH PDF) |
DS1678 Real-Time Event Recorder
18 of 25
represents the total elapsed time since the previous event. The event counter is not incremented when the
ETC rolls over because a new event has not occurred.
The ETC is incremented as the selected seconds, minutes, or hours register of the RTC increments.
Because the RTC continues to run, even when the ETC is cleared to prepare for a new event, and the ETC
is incremented every time the selected byte in the RTC increments, the actual time resolution is not lost
even when events occur more frequently than the minimum time resolution selected. If an event occurs
half way between increments of the ETC, the first increment of the next event occurs when the seconds,
minutes, or hours register increments next, thus preserving the correct time to the resolution selected in
the DISx bits.
When the alarm interrupt output is used, the DISx bits should be set to zeros. An event-logging mission
cannot be started if the DISx bits are set to zero. This enables the alarm flag to generate an alarm interrupt
via the
INT output pin.
With the DIS0 bit set to one and the DIS1 bit set to zero, the ETC increments every time the seconds
register in the RTC is incremented. This gives the maximum resolution between events, but the counter
rolls over to the next two memory bytes when it reaches the maximum value. The largest interval between
events that can be accurately measured without using additional memory space and reducing the total
number of events able to be logged is 65,535 seconds, or about 18.2 hours. If the maximum time between
events could be greater than 18.2 hours, consider using one of the courser resolutions to conserve
memory.
With the DIS0 bit set to zero and the DIS1 bit set to one, the ETC increments every time the minutes
register in the RTC is incremented. This gives a medium resolution between events, but increases the
largest possible interval between events that can be accurately measured without using additional memory
space and reduces the total number of events able to be logged to 65,535 minutes, or about 45.5 days.
With both DISx bits set to one, the ETC increments every time the single hours byte in the RTC is
incremented. This gives the lowest resolution between events, but increases the largest possible interval
between events that can be accurately measured without using additional memory space and reduces the
total number of events able to be logged to 65,535 hours, or about 7.5 years.
If a second event occurs before the ETC is able to increment for the first time, all zeros are logged in the
event-log memory and the ETC resets. If this occurs, the time base remains correct as it is based on the
separate RTC incrementing, but the exact time of the event is no more accurate than the size of the time
increment that is chosen. For this reason, it is recommended to use the finest resolution possible for your
logging to minimize the errors. If the normal duration between events is several days or months, then a
few minutes or an hour may not be significant to your data accuracy.
Table 5. Duration Interval Select Bits
DIS1 DIS0
ELAPSED TIME COUNT
RESOLUTION
MAX TIME
BETWEEN EVENTS
0
Alarm Interrupt Output Enabled
—
0
1
Counter Increments Every Second
18.2 Hours
1
0
Counter Increments Every Minute
45.5 Days
1
Counter Increments Every Hour
7.5 Years
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1678S/T&R | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 32BYTE 8SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RECORDER REALTIME EVENT 8SOIC |
| DS1678S/T&R | 功能描述:IC RECORDER REALTIME EVENT 8SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件 |
| DS1678S+ | 功能描述:實時時鐘 Real-Time Event Recorder 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS1678S+T&R | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 32BYTE 8SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC REAL TIME EVENT REC 8-SOIC 制造商:Maxim Integrated Products 功能描述:Real Time Clock Real-Time Event Recorder |
| DS1678S+T&R | 功能描述:實時時鐘 Real-Time Event Recorder 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 時間格式:HH:MM:SS RTC 存儲容量: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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