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参数资料
| 型号： | DS1685S-3 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| 封装： | 0.300 INCH, SOP-24 |
| 文件页数： | 6/34页 |
| 文件大小： | 455K |
| 代理商： | DS1685S-3 |
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DS1685/DS1687 3V/5V Real-Time Clocks
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Register C (0Ch)
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
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 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 a 1 independently of the state of
the PIE bit. When both PF and PIE are 1’s, the
IRQ signal is active and sets the IRQF bit. This bit may be cleared
by reading Register C.
AF – A 1 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 goes low and a 1 appears in the IRQF bit. This bit may be cleared by reading Register C.
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 asserts the
IRQ pin. This bit may be cleared by reading Register C.
BIT 3, BIT2, BIT 1, BIT 0 - These are unused bits of the status Register C. These bits always read 0 and cannot be
written.
Register D (0Dh)
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, BIT 5, BIT 4, BIT 3, BIT 2, BIT 1, BIT 0 – The remaining bits of Register D are not usable. They cannot be
written and when read will always read 0.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1685E-5 | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| DS1685QN-3 | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| DS1685QN-5 | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| DS1685SN-5 | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| DS1687-3 | 1 TIMER(S), REAL TIME CLOCK, DIP24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1685S-3/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 |
| DS1685S-3/TR | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clocks |
| DS1685S-3_12 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:3V/5V Real-Time Clocks |
| DS1685S-3+ | 功能描述:实时时钟 3V/5V RTC 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 |
| DS1685S-3+T& | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clocks |
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