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參數(shù)資料
| 型號： | DS1685EN-5 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| 封裝： | TSOP-24 |
| 文件頁數(shù)： | 3/39頁 |
| 文件大?。?/td> | 290K |
| 代理商： | DS1685EN-5 |
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DS1685/DS1687
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REGISTER C
MSB
LSB
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
IQRF
PF
AF
UF
0
IRQF - The Interrupt Request Flag (IRQF) bit is set to a 1 when one or more of the following are true:
PF = PIE = 1
WF = WIE= 1
AF = AIE = 1
KF = KSE= 1
UF = UIE = 1
RF = RIE = 1
i.e., IRQF = (PF
PIE) + (AF AIE) + (UF UIE) + (WF WIE) + (KF KSE) + (RF RIE)
Any time the IRQF bit is a 1, the IRQ pin is driven low. Flag bits PF, AF, and UF are cleared after
Register C is read by the program.
PF - The Periodic Interrupt Flag (PF) is a read-only bit which is set to a 1 when an edge is detected on the
selected tap of the divider chain. The RS3 through RS0 bits establish the periodic rate. PF is set to a 1
independent of the state of the PIE bit. When both PF and PIE are 1’s, the IRQ signal is active and will
set the IRQF bit. The PF bit is cleared by a software read of Register C.
AF - A one in the Alarm Interrupt Flag (AF) bit indicates that the current time has matched the alarm
time. If the AIE bit is also a 1, the IRQ pin will go low and a 1 will appear in the IRQF bit. A read of
Register C will clear AF.
UF - The Update Ended Interrupt Flag (UF) bit is set after each update cycle. When the UIE bit is set to
1, the one in UF causes the IRQF bit to be a 1 which will assert the IRQ pin. UF is cleared by reading
Register C.
BIT 3 THROUGH BIT 0 - These are unused bits of the status Register C. These bits always read 0 and
cannot be written.
REGISTER D
MSB
LSB
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
VRT
0
VRT - The Valid RAM and Time (VRT) bit indicates the condition of the battery connected to the VBAT
pin or the battery connected to VBAUX, whichever is at a higher voltage. This bit is not writable and
should always be a 1 when read. If a 0 is ever present, an exhausted lithium energy source is indicated
and both the contents of the RTC data and RAM data are questionable.
BIT 6 THROUGH BIT 0 - The remaining bits of Register D are not usable. They cannot be written and
when read will always read 0.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1685-5 | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| DS1685SN-3 | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| DS1685Q-5 | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| DS1689SN | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| DS1689S | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1685EN-5/T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC 5V 64BIT Y2K IND 24TSSOP |
| DS1685EN-5/T&R | 功能描述:實(shí)時時鐘 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 |
| DS1685EN-5/TR | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Real-Time Clocks |
| DS1685EN-5_12 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:3V/5V Real-Time Clocks |
| DS1685EN-5+ | 功能描述:實(shí)時時鐘 3V/5V RTC 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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