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參數(shù)資料
| 型號： | 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)： | 2/24頁 |
| 文件大?。?/td> | 301K |
| 代理商： | DS1678 |
DS1678
10 of 24
TIME OF DAY ALARM BITS Table 1
ALARM REGISTER MASK BITS (bit 7)
SECONDS
(MS)
MINUTES
(MM)
HOURS
(MH)
DAYS
(MD)
1
ALARM ONCE PER SECOND
0
1
ALARM WHEN SECONDS MATCH
0
1
ALARM WHEN MINUTES AND SECONDS
MATCH
0
1
ALARM WHEN HOURS, MINUTES, AND
SECONDS MATCH
0
ALARM WHEN DAY,HOURS,MINUTES, AND
SECONDS MATCH
The DS1678 also contains a time of day alarm. The alarm registers are located in registers 08h to 0Bh.
Bit 7 of each of the alarm registers are mask bits (see Table 1). When all of the mask bits are logic 0, an
alarm will occur once per week when the values stored in timekeeping registers 00h to 03h match the
values stored in the time of day alarm registers. An alarm will be generated every day when mask bit of
the day alarm register is set to 1. An alarm will be generated every hour when the day and hour alarm
mask bits are set to 1. Similarly, an alarm will be generated every minute when the day, hour, and
minute alarm mask bits are set to 1. When day, hour, minute, and seconds alarm mask bits are set to 1,
an alarm will occur every second.
As a security measure to prevent unauthorized tampering, writing to any memory location or changing
any value in the RTC and Control registers will stop a event log mission and clear the Mission-in-
Progress (MIP) bit to a 0.
SPECIAL PURPOSE REGISTERS
The following description defines the operation of the special function registers of the DS1678.
CONTROL REGISTER
MSB
LSB
ME
CLR
DIS1
DIS0
RO
TR1
TR0
COE
ME - Mission Enable - This bit enables the device to begin a mission. The ME bit can not be written to
a 1 unless the MEM CLR bit in the Status register is a 1, signifying that the memory and registers have
been cleared. With the ME bit set to a one, the device will wait for the first event to occur ( INT is
activated). Once that first event occurs, the time/date stamp will be recorded in the Start Time Stamp
register, the Event 0 Elapsed Time From Last Event bytes are both written with zero’s, the Event Count
register will be incremented, and the elapsed time count will begin incrementing to be ready with the
duration of time from the first event until the next event.
When the ME bit is set to logic 0, the DS1678 will wait until a 1 is written to the MIP bit via the 2-wire
interface to start the mission. When the MIP bit is written to a 1, the ME bit will be set to a one, the
current time/date will be recorded in the Start Time Stamp, the Event 0 Elapsed Time From Last Event
bytes are both written with zero’s, the Event Count register will be incremented, and the elapsed time
count will begin incrementing to be ready with the duration of time from the start until the first event.
The ME bit is automatically written to a 0 whenever a mission is stopped.
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 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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