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參數(shù)資料
| 型號： | DS1554WP-150 |
| 英文描述： | 256K NV Y2KC Timekeeping RAM |
| 中文描述： | 256K內(nèi)存時鐘非易失Y2KC |
| 文件頁數(shù)： | 8/21頁 |
| 文件大?。?/td> | 284K |
| 代理商： | DS1554WP-150 |
DS1554
8 of 21
ALARM MASK BITS
Table 3
AM4
AM3
1
1
1
1
1
1
1
0
0
0
When the RTC Register values match Alarm Register settings, the Alarm Flag bit (AF) is set to a 1. If
Alarm Flag Enable (AE) is also set to a 1, the alarm condition activates the
IRQ
/FT pin. The
IRQ
/FT
signal is cleared by a read or write to the Flags Register (Address 7FF0h) as shown in Figure 2 and 3. The
IRQ
/FT signal may be cleared by having the address stable for as short as 15 ns and either
CE
or
WE
active, but is not guaranteed to be cleared unless t
RC
is fulfilled. The alarm flag is also cleared by a read or
write to the Flags Register but the flag will not change states until the end of the read/write cycle and the
IRQ
/FT signal has been cleared.
AM2
1
1
0
0
0
AM1
1
0
0
0
0
ALARM RATE
Once per second
When seconds match
When minutes and seconds match
When hours, minutes, and seconds match
When date, hours, minutes, and seconds match
CLEARING IRQ WAVEFORMS
Figure 2
CLEARING IRQ WAVEFORMS
Figure 3
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| DS1554WP-120 | 256K NV Y2KC Timekeeping RAM |
| DS1554W-150 | 256K NV Y2KC Timekeeping RAM |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1556 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
| DS1556_10 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
| DS1556-70 | 功能描述:實時時鐘 1M NV RAM Timekeeper 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1556-70+ | 功能描述:實時時鐘 1M NV RAM Timekeeper 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1556-70IND | 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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