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參數(shù)資料
| 型號： | DS1689 |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 7/36頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RTC SER W/NV RAM CTRL 28-DIP |
| 標準包裝： | 13 |
| 類型： | 時鐘/日歷 |
| 特點： | NVSRAM |
| 存儲容量： | 114B |
| 時間格式： | HH:MM:SS（12/24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | 并聯(lián) |
| 電源電壓： | 2.7 V ~ 3.3 V，4.5 V ~ 5.5 V |
| 電壓 - 電源，電池： | 2.5 V ~ 3.7 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 28-DIP（0.600"，15.24mm） |
| 供應(yīng)商設(shè)備封裝： | 28-PDIP |
| 包裝： | 管件 |
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DS1689/DS1693
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REGISTER C
MSB
LSB
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
IRQF
PF
AF
UF
0
Bit 7: IRQF (Interrupt Request Flag). This bit is set to 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 1, the
IRQ pin is driven low. Flag bits PF, AF, and UF are cleared after Register
C is read by the program.
Bit 6: PF (Periodic Interrupt Flag). This bit is a read-only bit that is set to a 1 when an edge is detected
on the selected tap of the divider chain. The RS3–RS0 bits establish the periodic rate. PF is set to 1
independent of the state of the PIE bit. When both PF and PIE are 1s, the
IRQ signal is active and will set
the IRQF bit. The PF bit is cleared by a software read of Register C.
Bit 5: AF (Alarm Interrupt Flag). A 1 in the AF bit indicates that the current time has matched the
alarm time. If the AIE bit is also 1, the
IRQ pin goes low and a 1 appears in the IRQF bit. A read of
Register C clears AF.
Bit 4: UF (Update-Ended Interrupt Flag). This bit is set after each update cycle. When the UIE bit is
set to 1, the 1 in UF causes the IRQF bit to be 1, which asserts the
IRQ pin. UF is cleared by reading
Register C.
Bits 3 to 0: Unused. 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
Bit 7: VRT (Valid RAM and Time). This 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.
Bits 6 to 0: Unused. These bits cannot be written and always read 0 when read.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1689_05 | 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 |
| DS1689S | 功能描述:實時時鐘 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1689S/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 |
| DS1689S/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 |
| DS1689S/T&R | 制造商:Rochester Electronics LLC 功能描述: |
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