Low-Current, I2C, Serial Real-Time Clock 13 Maxim Integrated Status Regi" />
參數(shù)資料
型號(hào)： DS1339AU+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 5/19頁(yè)
文件大?。?/td> 0K
描述： IC RTC I2C W/ALARM 8USOP
標(biāo)準(zhǔn)包裝： 3,000
類型： 時(shí)鐘/日歷
特點(diǎn)： 警報(bào)器，閏年，方波輸出，涓流充電器
時(shí)間格式： HH:MM:SS（12/24 小時(shí)）
數(shù)據(jù)格式： YY-MM-DD-dd
接口： I²C，2 線串口
電源電壓： 1.71 V ~ 5.5 V
電壓 - 電源，電池： 1.3 V ~ 3.7 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 8-uMAX
包裝： 帶卷 (TR)
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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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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DS1339C-2- 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C Serial Real-Time Clock
DS1339C-2# 功能描述:實(shí)時(shí)時(shí)鐘 I2C Serial 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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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