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参数资料
| 型号： | DS1501YSN |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| 封装： | 0.720 INCH, PLASTIC, SOIC-28 |
| 文件页数： | 6/30页 |
| 文件大小： | 291K |
| 代理商： | DS1501YSN |
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DS1501/DS1511
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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 VCC voltage decays, the IRQ output pin will be placed in a high
impedance state when VCC goes below VPF. 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.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1511W | 1 TIMER(S), REAL TIME CLOCK, DMA28 |
| DS1511Y | 1 TIMER(S), REAL TIME CLOCK, DMA28 |
| DS1501YE | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| DS1501WS | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| DS1501Y | 1 TIMER(S), REAL TIME CLOCK, PDIP28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1501YSN/T&R | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK PARALLEL 256BYTE 28SOIC - Tape and Reel |
| DS1501YSN+ | 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 |
| DS1501YSN+T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC WDOG Y2K 5V IND 28-SOIC |
| DS1501YSN+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 |
| DS1501YZ+ | 功能描述:实时时钟 Y2K-Compliant Watchdog 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 |
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