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參數(shù)資料
| 型號(hào)： | DS1678 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP8 |
| 封裝： | 0.300 INCH, DIP-8 |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 301K |
| 代理商： | DS1678 |
DS1678
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MIP - Mission in Progress - This bit indicates the sampling status of the DS1678. If MIP is logic 1, the
device is currently on a “mission” in which it is operating in the event logging mode. The MIP bit is
changed to logic 1 immediately following the activation of the INT pin if the Mission Enable bit of the
Control register contains a 1. In order to immediately start an event logging mission via the 2-wire bus, a
1 can be written into the MIP bit and a 1 will automatically be written into the ME bit of the Control
register.
If MIP is logic 0, the DS1678 is not currently in event logging mode. The MIP bit transitions from logic
1 to logic 0 whenever event logging is stopped. Event logging is stopped when the DS1678 is cleared by
writing to the clear enable and memory clear bits or when any memory location including the RTC or
Control registers are written to during a mission. The MIP bit can also be written to logic 0 by the end
user to stop event logging via the 2-wire bus. By writing a 0 to the MIP bit and stopping the mission, a 0
is automatically written to the ME bit of the control register. It cannot, however, be written to logic 1 to
start a mission unless the MEM CLR bit is a 1 to signify that the memory has been cleared.
CM - Clear Memory - This bit will trigger the memory to be cleared if the CLR clear enable and COE
clock oscillator enable bits in the control register are set to a 1. This will cause the event log memory,
Event Count, and Start Time Stamp registers to all be cleared to zeros. Once the memory has been
cleared, the CLR enable bit and the CM bits will be set to zeros and the MEM CLR bit will be set to a 1
to allow a new mission to begin. Clearing the memory is a two write process to reduce the risk of
accidentally erasing the memory. The CLR bit must be set to a 1 before the CM bit can be written to a 1.
During the clear memory operation the DS1678 should not be accessed for 500 us while the memory is
erased. The MEM CLR bit should read a 1 before trying to access the cleared memory or registers.
LOBAT - Low Battery Flag - This bit reflects the status of the backup power source connected to the
VBAT pin. A logic one for this bit indicates an exhausted lithium energy source.
ROF - Roll Over Flag - This bit will be set to a one if the RO bit of the Control register is set to a one,
the last Data Log memory location has been filled and a new event has occurred which will cause the
Time/Date stamp to be over written. If RO is set to a 0 (roll over is disabled), the last Data Log memory
location has been filled and an new event has occurred, ROF will be set to a 1 to indicate that more events
have occurred than the number of available memory locations. The Event Counter will continue to record
events, even after the Event Log memory is full. The ROF is cleared by the Clear Memory command.
ALMF - Alarm Flag - A logic 1 in the Alarm Flag bit indicates that the current time has matched the
time of day Alarm registers. If at the same time, the DISx bits are both logic 0’s, the INT pin will go low
to issue an Alarm Interrupt. ALMF is a read only bit and is cleared by accessing any of the Alarm
register bytes either with a read or a write. Writing any memory location during a mission will stop the
mission. A mission can not be started when the DISx bits are both set to 0.
EVENT COUNTER
This three-byte register set provides the number of events that have been logged during the current data
logging operation (also known as a “mission”). The contents of this register can be used by software to
point to the most recent data sample in the Event Log Memory. The data in these registers are cleared
when the Event Log Memory is cleared. The Event Counter is not incremented when the Elapsed Time
Counter reaches FFh and rolls over to the next 16-bits of memory.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1682S | 0 TIMER(S), TIME RECORDER, PDSO8 |
| DS1682 | 0 TIMER(S), TIME RECORDER, PDSO8 |
| DS1685-3 | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| DS1687-5 | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| DS1685Q-3 | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1678+ | 功能描述:實(shí)時(shí)時(shí)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(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 |
| DS1678J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-Input Digital Multiplexer |
| DS1678J/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-Input Digital Multiplexer |
| DS1678K | 功能描述:KIT EVAL RT EVENT RECORD DS1678 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時(shí)/停產(chǎn)零件編號(hào) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| DS1678S | 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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