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参数资料
| 型号： | DS1315EN-33 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
| 封装： | 4.40 MM, TSSOP-20 |
| 文件页数： | 18/23页 |
| 文件大小： | 318K |
| 代理商： | DS1315EN-33 |
DS1315 Phantom Time Chip
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Operation
Communication with the Time Chip is established by pattern recognition of a serial bit stream of 64 bits
which must be matched by executing 64 consecutive write cycles containing the proper data on data in
(D). All accesses which occur prior to recognition of the 64-bit pattern are directed to memory via the
chip enable output pin ( CEO ).
After recognition is established, the next 64 read or write cycles either extract or update data in the Time
Chip and CEO remains high during this time, disabling the connected memory.
Data transfer to and from the timekeeping function is accomplished with a serial bit stream under control
of chip enable input ( CEI ), output enable ( OE ), and write enable ( WE ). Initially, a read cycle using the
CEI
and OE control of the Time Chip starts the pattern recognition sequence by moving pointer to the
first bit of the 64-bit comparison register. Next, 64 consecutive write cycles are executed using the CEI
and WE control of the Time Chip. These 64 write cycles are used only to gain access to the Time Chip.
When the first write cycle is executed, it is compared to bit 1 of the 64-bit comparison register. If a match
is found, the pointer increments to the next location of the comparison register and awaits the next write
cycle. If a match is not found, the pointer does not advance and all subsequent write cycles are ignored. If
a read cycle occurs at any time during pattern recognition, the present sequence is aborted and the
comparison register pointer is reset. Pattern recognition continues for a total of 64 write cycles as
described above until all the bits in the comparison register have been matched. (This bit pattern is shown
in Figure 2). With a correct match for 64 bits, the Time Chip is enabled and data transfer to or from the
timekeeping registers may proceed. The next 64 cycles will cause the Time Chip to either receive data on
D, or transmit data on Q, depending on the level of OE pin or the WE pin. Cycles to other locations
outside the memory block can be interleaved with CEI cycles without interrupting the pattern recognition
sequence or data transfer sequence to the Time Chip.
A standard 32.768 kHz quartz crystal can be directly connected to the DS1315 via pins 1 and 2 (X1, 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 considerations, please consult Application Note 58, “Crystal
Considerations with Dallas Real Time Clocks.”
相关PDF资料 |
PDF描述 |
|---|---|
| DS1315N-5 | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
| DS1315E-33 | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
| DS1315-33 | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
| DS1315N-33 | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
| DS1315SN-5 | 0 TIMER(S), REAL TIME CLOCK, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1315EN-33/R | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Phantom Time Chip |
| DS1315EN-33/T | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Phantom Time Chip |
| DS1315EN-33/T&R | 制造商:Maxim Integrated Products 功能描述:MAXIM DS1315EN-33/T&R REAL TIME CLOCKS (RTC) - Tape and Reel 制造商:Maxim Integrated Products 功能描述:Maxim DS1315EN-33/T&R Real Time Clocks (RTC) 制造商:Maxim Integrated Products 功能描述:IC T-CHP PHANTOM 3.3V IN 20TSSOP |
| DS1315EN-33/T&R | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1315EN-33+ | 功能描述:实时时钟 Phantom Time Chip RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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