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參數(shù)資料
| 型號： | DS1501YS |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| 封裝： | 0.720 INCH, PLASTIC, SOIC-28 |
| 文件頁數(shù)： | 3/30頁 |
| 文件大?。?/td> | 291K |
| 代理商： | DS1501YS |
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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
相關(guān)PDF資料 |
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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1501YS+ | 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 |
| 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: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 |
| DS1501YSN | 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 |
| 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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