參數(shù)資料
型號(hào): DS1554W-120
廠商: DALLAS SEMICONDUCTOR
元件分類(lèi): Timer or RTC
英文描述: 0 TIMER(S), REAL TIME CLOCK, PDMA32
封裝: DIP-32
文件頁(yè)數(shù): 20/21頁(yè)
文件大?。?/td> 284K
代理商: DS1554W-120
DS1554
8 of 21
ALARM MASK BITS Table 3
AM4
AM3
AM2
AM1
ALARM RATE
1111
Once per second
1110
When seconds match
1100
When minutes and seconds match
1000
When hours, minutes, and seconds match
0000
When date, hours, minutes, and seconds match
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 tRC 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.
CLEARING IRQ WAVEFORMS Figure 2
CLEARING IRQ WAVEFORMS Figure 3
相關(guān)PDF資料
PDF描述
DS1554P-70 0 TIMER(S), REAL TIME CLOCK, DMA34
DS1554 REAL TIME CLOCK, DMA32
DS1556-70 REAL TIME CLOCK, PDMA32
DS1556W-120 REAL TIME CLOCK, DMA32
DS1556 REAL TIME CLOCK, DMA32
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DS1554W-120+ 功能描述:實(shí)時(shí)時(shí)鐘 256kB 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(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
DS1554W-120IND 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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DS1554W-150 制造商:DALLAS 制造商全稱(chēng):Dallas Semiconductor 功能描述:256K NV Y2KC Timekeeping RAM
DS1554WP 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Real-Time Clock