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参数资料
| 型号： | DS1501YS |
| 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： | 3/30页 |
| 文件大小： | 291K |
| 代理商： | DS1501YS |
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DS1501/DS1511
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The watchdog timer is reloaded when the processor performs a write of the Watchdog registers. The
time-out period then starts over. The watchdog timer is disabled by writing a value of 00h to both
watchdog registers. The watchdog function is automatically disabled upon power-up by the POWER on
RESET setting WDE=0 and WDS=0. The watchdog registers are not initialized at power up and should
be initialized by the user.
The following summarizes the configurations in which the watchdog can be used.
1. WDE=0 and WDS=0: WDF will be set.
2. WDE=0 and WDS=1: WDF will be set.
3. WDE=1 and WDS=0: WDF and IRQF will be set, and the IRQ pin will be pulled low.
4. WDE=1 and WDS=1: WDF will be set, the RST pin will be pulled low for a duration of 40 ms to
200 ms, and ‘WDE’ will be reset to ‘0’.
CLEARING IRQ AND FLAGS
The Time of Day/Date Alarm Flag (TDF), Watchdog Flag (WDF), and Interrupt Request Flag (IRQF),
are cleared by reading the flag register (0EH) as shown in Figures 2a, 2b, and 2c. The address must be
stable for a minimum of 15 ns (tIRQZ). After the tIRQZ requirement has been met, either a change in
address (figure 2a), a rising edge of OE (figure 2b), or a rising edge of CS (Figure 2c) will cause the flags
to be cleared. The IRQ pin will go inactive after the IRQF flag is cleared.
IRQ AND FLAG WAVEFORMS (ADDRESS RELATED) Figure 2a
相关PDF资料 |
PDF描述 |
|---|---|
| DS1501WE | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| DS1553W-150 | 0 TIMER(S), REAL TIME CLOCK, PDIP28 |
| DS1553P-70 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
| DS1553-70 | 0 TIMER(S), REAL TIME CLOCK, PDIP28 |
| DS1553WP-150 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1501YS+ | 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 |
| DS1501YS+T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC WDOG Y2K 5V 28-SOIC |
| DS1501YS+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 |
| 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:REAL TIME CLOCK PARALLEL 256BYTE 28SOIC - Tape and Reel |
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