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参数资料
| 型号： | DS1302 |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP8 |
| 封装： | 0.300 INCH, DIP-8 |
| 文件页数： | 7/14页 |
| 文件大小： | 217K |
| 代理商： | DS1302 |
DS1302
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Interfacing the DS1302 with a microprocessor is simplified by using synchronous serial communication.
Only three wires are required to communicate with the clock/RAM: (1) RST (Reset), (2) I/O (Data line),
and (3) SCLK (Serial clock). Data can be transferred to and from the clock/RAM 1 byte at a time or in a
burst of up to 31 bytes. The DS1302 is designed to operate on very low power and retain data and clock
information on less than 1 microwatt.
The DS1302 is the successor to the DS1202. In addition to the basic timekeeping functions of the
DS1202, the DS1302 has the additional features of dual power pins for primary and back–up power
supplies, programmable trickle charger for VCC1, and seven additional bytes of scratchpad memory.
OPERATION
The main elements of the Serial Timekeeper are shown in Figure 1: shift register, control logic, oscillator,
real time clock, and RAM.
DS1302 BLOCK DIAGRAM Figure 1
SIGNAL DESCRIPTIONS
VCC1 – VCC1 provides low power operation in single supply and battery operated systems as well as low
power battery backup. In systems using the trickle charger, the rechargeable energy source is connected
to this pin.
VCC2 – Vcc2 is the primary power supply pin in a dual supply configuration. VCC1 is connected to a
backup source to maintain the time and date in the absence of primary power.
The DS1302 will operate from the larger of VCC1 or VCC2. When VCC2 is greater than VCC1 + 0.2V, VCC2
will power the DS1302. When VCC2 is less than VCC1, VCC1 will power the DS1302.
SCLK (Serial Clock Input) – SCLK is used to synchronize data movement on the serial interface.
I/O (Data Input/Output) – The I/O pin is the bi-directional data pin for the 3-wire interface.
RST (Reset) – The reset signal must be asserted high during a read or a write.
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
| DS1302S-16 | 0 TIMER(S), REAL TIME CLOCK, PDSO16 |
| DS1305EN | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1302_05 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Trickle-Charge Timekeeping Chip |
| DS1302+ | 功能描述:实时时钟 Trickle-Charge Timekeeping 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 |
| DS1302-H35 | 制造商:Distributed By MCM 功能描述:DS1302 RTC BREAKOUTBREAKOUT 制造商:Distributed By MCM 功能描述:DS1302 Real Time Clock Breakout Board 制造商:MCM 功能描述:DS1302 RTC BREAKOUT BREAKOUT |
| DS1302N | 功能描述:实时时钟 Trickle-Charge Timekeeping 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 |
| DS1302N+ | 功能描述:实时时钟 Trickle-Charge Timekeeping 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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