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參數(shù)資料
| 型號(hào)： | DS1501WS |
| 英文描述： | Real-Time Clock |
| 中文描述： | 實(shí)時(shí)時(shí)鐘 |
| 文件頁數(shù)： | 14/30頁 |
| 文件大?。?/td> | 291K |
| 代理商： | DS1501WS |
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DS1501/DS1511
14 of 30
At the beginning of interval 3, the system processor has begun code execution and clears the interrupt
condition of TDF and/or KSF by writing zeroes to both of these control bits. As long as no other interrupt
within the DS1501/DS1511 is pending, the
IRQ
line will be taken inactive once these bits are reset, and
execution of the application software may proceed. During this time, both the wakeup and kickstart
functions may be used to generate status and interrupts. TDF will be set in response to a day/date, hours,
minutes, and seconds match condition. KSF will be set in response to a low going transition on
KS
. If the
associated interrupt enable bit is set (TIE and/or KIE) then the
IRQ
line will be driven low in response to
enabled event. In addition, the other possible interrupt sources within the DS1501/DS1511 may cause
IRQ
to be driven low. While system power is applied, the on chip logic will always attempt to drive the
PWR
pin active in response to the enabled kickstart or wake up condition. This is true even if
PWR
was
previously inactive as the result of power being applied by some means other than wake up or kickstart.
The system may be powered down under software control by setting the PAB bit to a “1”. The PAB bit
can only be set to a “1” after the TDF and KSF flags have been cleared to a”0”. Setting PAB to a “1”
causes the open-drain
PWR
pin to be placed in a high impedance state, as shown at the beginning of
interval 4 in the timing diagram. As V
CC
voltage decays, the
IRQ
output pin will be placed in a high
impedance state when V
CC
goes below V
PF
. If the system is to be again powered on in response to a wake
up or kickstart, then both the TDF and KSF flags should be cleared and TPE and/or KIE should be
enabled prior to setting the PAB bit.
During interval 5, the system is fully powered down. Battery backup of the clock calendar and nonvolatile
RAM is in effect and
IRQ
is tri-stated, and monitoring of wake up and kickstart takes place. If PRS="1",
PWR
stays active, otherwise if PRS="0",
PWR
is tri-stated.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1501Y | Real-Time Clock |
| DS1501YE | Real-Time Clock |
| DS1501YS | Real-Time Clock |
| DS1501 | Y2K-Compliant Watchdog Real-Time Clocks |
| DS1511 | Y2K-Compliant Watchdog Real-Time Clocks |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1501WS/T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC WDOG Y2KC 3.3V 28-SOIC |
| DS1501WS/T&R | 功能描述:實(shí)時(shí)時(shí)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(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 |
| DS1501WS+ | 功能描述:實(shí)時(shí)時(shí)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(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 |
| DS1501WS+T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC WDOG Y2KC 3.3V 28-SOIC |
| DS1501WS+T&R | 功能描述:實(shí)時(shí)時(shí)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(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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