參數(shù)資料
型號(hào): DS1486
廠商: Maxim Integrated Products, Inc.
英文描述: RAMified Watchdog Timekeeper(RAM化的看門狗計(jì)時(shí)器)
中文描述: RAMified看門狗計(jì)時(shí)器
文件頁數(shù): 3/16頁
文件大小: 174K
代理商: DS1486
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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參數(shù)描述
DS1486-120 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
DS1486-120+ 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
DS1486-150 制造商:Maxim Integrated Products 功能描述:Real Time Clock, Non-Volatile, 32 Pin, Plastic, DIP
DS1486P 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:RAMified Watchdog Timekeeper
DS1486P-120 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