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參數(shù)資料
| 型號： | DS1689SN |
| 英文描述： | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| 中文描述： | 3-Volt/5-Volt序列實時時鐘的非易失RAM控制 |
| 文件頁數(shù)： | 14/32頁 |
| 文件大?。?/td> | 321K |
| 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
IRQF
PF
AF
UF
BIT 3
0
BIT 2
0
BIT 1
0
BIT 0
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
AF = AIE = 1
UF = UIE = 1
WF = WIE = 1
KF = KSE = 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 a one, 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 which is set to a 1 when an edge is detected on the
selected tap of the divider chain. The RS3 through RS0 bits establish the periodic rate. PF is set to a 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.
AF
- A one 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 will go low and a one will appear in the IRQF bit. A read of
Register C will clear AF.
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 will assert the
IRQ
pin. UF is cleared by reading
Register C.
BIT 0 THROUGH BIT 3
- These are unused bits of the status Register C. These bits always read 0 and
cannot be written.
REGISTER D
MSB LSB
BIT 7
BIT 6
BIT 5
BIT 4
VRT
0
0
0
BIT 3
0
BIT 2
0
BIT 1
0
BIT 0
0
VRT
- The Valid RAM and Time (VRT) bit indicates the condition of the battery connected to the V
BAT
pin or the battery connected to V
BAUX
, 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 THROUGH BIT 0
-
The remaining bits of Register D are not usable. They cannot be written and,
when read, they will always read 0.
相關(guān)PDF資料 |
PDF描述 |
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| DS1693 | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| DS1699-010 | ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-10 | ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-100 | ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-50 | ELECTRONIC DIGITAL RHEOSTAT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1689SN/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 |
| DS1689SN/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 |
| 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: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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1689SN+ | 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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