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参数资料
| 型号： | DS1689SN |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| 封装： | 0.330 INCH, SOIC-28 |
| 文件页数： | 7/36页 |
| 文件大小： | 594K |
| 代理商： | DS1689SN |
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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.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1689S | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| DS1693 | 1 TIMER(S), REAL TIME CLOCK, PDMA28 |
| DS1689 | 1 TIMER(S), REAL TIME CLOCK, PDIP28 |
| DS1720S+T&R | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT |
| DS1720S+ | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), RECTANGULAR, SURFACE MOUNT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1689SN/R | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Serialized Real-Time Clocks with NV RAM Control |
| DS1689SN/T | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Serialized Real-Time Clocks with NV RAM Control |
| DS1689SN/T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC SER NV RAM CTRL IN 28SOIC |
| DS1689SN/T&R | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1689SN+ | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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