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| 型号： | DS1339AD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/19页 |
| 文件大小： | 0K |
| 描述： | IC RTC I2C W/ALARM 8TDFN-EP |
| 标准包装： | 3,000 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，方波输出，涓流充电器 |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | I²C，2 线串口 |
| 电源电压： | 1.71 V ~ 5.5 V |
| 电压 - 电源，电池： | 1.3 V ~ 3.7 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
DS1339A
Low-Current, I2C, Serial Real-Time Clock
13
Maxim Integrated
Status Register (0Fh)
The control register controls the operation of the SQW/INT pin and provides oscillator status.
Bit 7: Oscillator Stop Flag (OSF). A logic 1 in this bit indicates that the oscillator has stopped or was stopped for some
time period and can be used to judge the validity of the clock and calendar data. This bit is edge triggered, and is set to
logic 1 when the internal circuitry senses the oscillator has transitioned from a normal run state to a stopped condition.
The following are examples of conditions that may cause the OSF bit to be set:
The first time power is applied.
The voltage present on VCC and VBAT are insufficient to support oscillation.
The EOSC bit is set to 1, disabling the oscillator.
External influences on the crystal (i.e., noise, leakage, etc.).
This bit remains at logic 1 until written to logic 0. This bit can only be written to logic 0. Attempting to write OSF to logic
1 leaves the value unchanged.
Bit 1: Alarm 2 Flag (A2F). A logic 1 in the Alarm 2 Flag bit indicates that the time matched the Alarm 2 registers. If the
A2IE bit is a logic 1 and the INTCN bit is set to a logic 1, the SQW/INT pin is also asserted. A2F is cleared when written
to logic 0. This bit can only be written to logic 0. Attempting to write to logic 1 leaves the value unchanged.
Bit 0: Alarm 1 Flag (A1F). A logic 1 in the Alarm 1 Flag bit indicates that the time matched the Alarm 1 registers. If the
A1IE bit is a logic 1 and the INTCN bit is set to a logic 1, the SQW/INT pin is also asserted. A1F is cleared when written
to logic 0. This bit can only be written to logic 0. Attempting to write to logic 1 leaves the value unchanged.
Bit #
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Name
OSF
0
A2F
A1F
POR
1
0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1339AU | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Current, I2C, Serial Real-Time Clock |
| DS1339AU+ | 功能描述:实时时钟 1.8-3.3V Serial 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 |
| DS1339AU+T | 功能描述:实时时钟 1.8-3.3V Serial 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 |
| DS1339BU+ | 功能描述:实时时钟 SERIAL RTC 1.8-3.3V C 1.8-3.3V HESR USOP 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 |
| DS1339BU+T | 制造商:Maxim Integrated Products 功能描述:SERIAL RTC 1.8-3.3V HESR USOP TRL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC I2C W/ALARM 8UMAX |
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