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參數資料
| 型號： | DS1486P |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | RAMified Watchdog Timekeeper(RAM化的看門狗計時器) |
| 中文描述： | RAMified看門狗計時器 |
| 文件頁數： | 3/16頁 |
| 文件大?。?/td> | 174K |
| 代理商： | DS1486P |
DS1486P
070298 3/16
exceed Vbat. During power-up, when V
CC
rises above
approximately 3.0 volts, the power switching circuit con-
nects external V
CC
and disconnects the internal lithium
energy source. Normal operation can resume after V
CC
exceeds 4.5 volts for a period of 200 ms.
RAMIFIED TIMEKEEPER REGISTERS
The RAMified Timekeeper has 14 registers which are
eight bits wide that contain all of the timekeeping, alarm,
watchdog and control information. The clock, calendar,
alarm, and watchdog registers are memory locations
which contain external (user–accessible) and internal
copies of the data. The external copies are independent
of internal functions except that they are updated peri-
odically by the simultaneous transfer of the incremented
internal copy (see Figure 1). The Command Register
bits are affected by both internal and external functions.
This register will be discussed later. Registers 0, 1, 2, 4,
6, 8, 9, and A contain time of day and date information
(see Figure 2). Time of day information is stored in BCD.
Registers 3, 5, and 7 contain the Time of Day Alarm in-
formation. Time of Day Alarm information is stored in
BCD. Register B is the Command Register and infor-
mation in this register is binary. Registers C and D are
the Watchdog Alarm Registers and information which is
stored in these two registers is in BCD. Register E
through 1FFFF are user bytes and can be used to main-
tain data at the user’s discretion.
CLOCK ACCURACY (DIP MODULE)
The DS1486 is guaranteed to keep time accuracy to
within
±
1 minute per month at 25
°
C.
CLOCK ACCURACY (POWERCAP MODULE)
The DS1486P and DS9034PCX are each individually
tested fore accuracy. Once mounted together, the mod-
ule is guaranteed to keep time accuracy to within
±
1.53
minutes per month (35 ppm) at 25
°
C.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS1486P-120 | 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 |
| DS1486P-120+ | 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 |
| DS1486P-150 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:RAMified Watchdog Timekeeper |
| DS1487 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Power RS-485 1⁄4 Unit Load Multipoint Transceiver |
| DS1487M | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數據速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
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