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參數(shù)資料
| 型號： | DS12887 |
| 英文描述： | Real Time Clock |
| 中文描述： | 實(shí)時(shí)時(shí)鐘 |
| 文件頁數(shù)： | 5/19頁 |
| 文件大?。?/td> | 584K |
| 代理商： | DS12887 |
DS12887
5 of 19
A. Periodic Interrupt Enable (PEI) bit is cleared to 0.
B. Alarm Interrupt Enable (AIE) bit is cleared to 0.
C. Update Ended Interrupt Flag (UF) bit is cleared to 0.
D. Interrupt Request Status Flag (IRQF) bit is cleared to 0.
E. Periodic Interrupt Flag (PF) bit is cleared to 0.
F. The device is not accessible until
RESET
is returned high.
G. Alarm Interrupt Flag (AF) bit is cleared to 0.
H.
IRQ
pin is in the high impedance state.
I.
Square Wave Output Enable (
SQWE
) bit is cleared to 0.
J.
Update Ended Interrupt Enable (UIE) is cleared to 0.
In a typical application
RESET
can be connected to V
CC
. This connection will allow the DS12887 to go in
and out of power fail without affecting any of the control registers.
ADDRESS MAP
The address map of the DS12887 is shown in Figure 2. The address map consists of 114 bytes of user
RAM, 10 bytes of RAM that contain the RTC time, calendar, and alarm data, and 4 bytes which are used
for control and status. All 128 bytes can be directly written or read except for the following:
1. Registers C and D are read–only.
2. Bit 7 of Register A is read–only.
3.
The high order bit of the seconds byte is read–only.
The contents of four registers (A,B,C, and D) are described in the “Registers” section.
ADDRESS MAP DS12887
Figure 2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS12B887 | Real Time Clock |
| DS12C887A | Real-Time Clock |
| DS12C887 | Real Time Clock |
| DS1300-3 | 1300 Watts 12V Distributed Power System |
| DS1301-7R | 100 Watt DC-DC Converters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS12887+ | 功能描述:實(shí)時(shí)時(shí)鐘 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(shí)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 |
| DS12887A | 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 |
| DS12887A+ | 功能描述:實(shí)時(shí)時(shí)鐘 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(shí)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 |
| DS1290 | 功能描述:計(jì)數(shù)器移位寄存器 RoHS:否 制造商:Texas Instruments 計(jì)數(shù)器類型: 計(jì)數(shù)順序:Serial to Serial/Parallel 電路數(shù)量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數(shù)量:1 輸出類型:Open Drain 傳播延遲時(shí)間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| DS12C887 | 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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