參數資料
型號: DS17485
廠商: Maxim Integrated Products, Inc.
英文描述: 3 Volt/5 Volt Real Time Clock(3V/5V實時時鐘)
文件頁數: 18/32頁
文件大?。?/td> 236K
代理商: DS17485
DS17485/DS17487
030598 18/32
The RTC address is latched on the falling edge of the
ALE signal. Each time an RTC address is latched, the
register address stack is pushed. The stack is only four
registers deep, holding the three previous RTC
addresses in addition to the current RTC address being
accessed. The following waveform illustrates how the
BIOS could recover the RTC address when an SMI
occurs.
1
2
3
4
ALE
1. The RTC address is latched.
2. An SMI is generated before an RTC read or write occurs.
3. RTC address 0Ah is latched and the address from “1” is pushed to the “RTC Address – 1” stack location. This
step is necessary to change the bank select bit, DV0=1.
4. RTC address 4Eh is latched and the address from “1” is pushed to location 4Eh, “RTC Address – 2” while 0Ah is
pushed to the “RTC Address – 1” location. The data in this register, 4Eh, is the RTC address lost due to the SMI.
相關PDF資料
PDF描述
DS1775 SOT23 Digital Thermometer and Thermostat(SOT23數字溫度計和恒溫控制器)
DS1800 Dual Inverting Log Gain/Attenuator(雙路反相對數放大/衰減器)
DS1801 Dual Audio Taper Potentiometer(雙路音頻抽頭電位器)
DS1802 Dual Audio Taper Potentiometer with Push Button Control(帶按鈕控制的雙路音頻抽頭電位器)
DS1803 Addressable Dual Digital Potentiometer(可尋址雙路數字電位器)
相關代理商/技術參數
參數描述
DS17485-3 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
DS17485-3+ 功能描述:實時時鐘 3V/5V RTC 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
DS17485-5 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
DS17485-5+ 功能描述:實時時鐘 3V/5V RTC 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
DS1748555 制造商:Maxim Integrated Products 功能描述: