參數(shù)資料
型號: DS1302N
廠商: DALLAS SEMICONDUCTOR
元件分類: Timer or RTC
英文描述: 0 TIMER(S), REAL TIME CLOCK, PDIP8
封裝: 0.300 INCH, DIP-8
文件頁數(shù): 10/14頁
文件大?。?/td> 217K
代理商: DS1302N
DS1302
5 of 14
Diode and resistor selection is determined by the user according to the maximum current desired for
battery or super cap charging. The maximum charging current can be calculated as illustrated in the
following example. Assume that a system power supply of 5 volt is applied to VCC2 and a super cap is
connected to VCC1. Also assume that the trickle charger has been enabled with one diode and resistor R1
between VCC2 and VCC1. The maximum current Imax would therefore be calculated as follows:
Imax = (5.0V – diode drop) / R1
~ (5.0V – 0.7V) / 2 k
~ 2.2 mA
Obviously, as the super cap charges, the voltage drop between VCC2 and VCC1 will decrease and therefore
the charge current will decrease.
CLOCK/CALENDAR BURST MODE
The clock/calendar command byte specifies burst mode operation.
In this mode the first eight
clock/calendar registers can be consecutively read or written (see Figure 4) starting with bit 0 of address
0.
If the write protect bit is set high when a write clock/calendar burst mode is specified, no data transfer
will occur to any of the eight clock/calendar registers (this includes the control register). The trickle
charger is not accessible in burst mode.
At the beginning of a clock burst read, the current time is transferred to a second set of registers. The
time information is read from these secondary registers, while the clock may continue to run. This
eliminates the need to re-read the registers in case of an update of the main registers during a read.
RAM
The static RAM is 31 x 8 bytes addressed consecutively in the RAM address space.
RAM BURST MODE
The RAM command byte specifies burst mode operation. In this mode, the 31 RAM registers can be
consecutively read or written (see Figure 4) starting with bit 0 of address 0.
REGISTER SUMMARY
A register data format summary is shown in Figure 4.
CRYSTAL SELECTION
A 32.768 kHz crystal can be directly connected to the DS1302 via X1 and X2. The crystal selected for
use should have a specified load capacitance (CL) of 6 pF. For more information on crystal selection and
crystal layout consideration, please consult Application Note 58, “Crystal Considerations with Dallas
Real Time Clocks."
相關(guān)PDF資料
PDF描述
DS1302SN 0 TIMER(S), REAL TIME CLOCK, PDSO8
DS1302 0 TIMER(S), REAL TIME CLOCK, PDIP8
DS1302Z 0 TIMER(S), REAL TIME CLOCK, PDSO8
DS1302SN-16 0 TIMER(S), REAL TIME CLOCK, PDSO16
DS1302ZN 0 TIMER(S), REAL TIME CLOCK, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1302N+ 功能描述:實(shí)時時鐘 Trickle-Charge Timekeeping Chip 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1302S 功能描述:實(shí)時時鐘 Trickle-Charge Timekeeping Chip 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1302S, 200MIL 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
DS1302S/T&R 制造商:Maxim Integrated Products 功能描述:IC TIMEKEEPER T-CHARGE 8-SOIC 制造商:Maxim Integrated Products 功能描述:IC RTC YY-MM-DD 31 X 8 SOIC-8 制造商:Maxim Integrated Products 功能描述:IC, RTC, YY-MM-DD, 31 X 8, SOIC-8 制造商:Maxim Integrated Products 功能描述:IC, RTC, YY-MM-DD, 31 X 8, SOIC-8, Date Format:DD:MM:YY, Clock Format:HH:MM:SS, 制造商:Maxim Integrated Products 功能描述:IC, RTC, YY-MM-DD, 31 X 8, SOIC-8, Date Format:DD:MM:YY, Clock Format:HH:MM:SS, Clock IC Type:RTC, Supply Voltage Min:2V, Supply Voltage Max:5.5V, Digital IC Case Style:SOIC, No. of Pins:8, IC Interface Type:3 Wire , RoHS Compliant: No
DS1302S/T&R 功能描述:實(shí)時時鐘 Trickle-Charge Timekeeping Chip 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube