DS1302实时时钟芯片技术规格

DS1302.pdfDS1302.pdfDS1302.pdf

需积分: 9 41 浏览量更新于2024-12-04 收藏 557KB PDF 举报

"DS1302是一款实时钟芯片，具备日期时间计数、低功耗、串行I/O、宽电压操作、简单的3线接口和额外的内存特性。" DS1302是一款高性能的实时钟（RTC）芯片，主要用于在电子设备中保持精确的时间和日期。该芯片能计算秒、分钟、小时、日期、月份、星期以及年份，并且自动处理闰年校正，其有效日期范围直至2100年。这使得DS1302成为各种需要时间戳功能的应用的理想选择，如嵌入式系统、消费电子设备和数据记录器。 DS1302具有31x8位的RAM空间，用于存储临时数据或用户数据。这个内置的RAM使得DS1302不仅能够维持时间，还可以作为一个小型的数据存储单元。该芯片采用串行I/O设计，减少了引脚数量，适用于紧凑型电路设计。它能在2.0到5.5伏的电压范围内全速运行，并且在2.0伏时的电流消耗仅为300纳安，这使其在低功耗应用中表现出色。数据传输可以是单字节或多个字节的连续模式（burst mode），无论是读取还是写入时钟或RAM数据，都十分高效。 DS1302采用8引脚DIP或8引脚SOIC封装，适合表面贴装技术。它具有一个简单的3线接口，即RST（复位）、I/O（数据输入/输出）和SCLK（串行时钟）。这种接口设计降低了系统集成的复杂性，使得与TTL兼容的5V电源连接变得容易。此外，DS1302支持扩展的工业温度范围，从-40°C到+85°C，保证了在各种环境条件下的稳定工作。该芯片还与DS1202兼容，但具有更多功能，例如提供涓流充电能力至VCC1引脚，双电源引脚用于主电源和备用电源，以及一个额外的7字节擦写内存。订购信息显示，DS1302有三种封装选项：DS1302是8引脚DIP封装，DS1302S是8引脚SOIC封装（200-mil间距），而DS1302Z可能是针对特定应用或条件的变体。 DS1302是一款功能强大、低功耗且易于集成的RTC芯片，广泛应用于需要精确时间管理的电子系统中。它的设计考虑了多种应用场景，包括对电源效率、温度适应性和数据存储的需求。

DS1302

of 13

ADDRESS/COMMAND BYTE Figure 2

RESET AND CLOCK CONTROL

All data transfers are initiated by driving the RST input high. The RST input serves two functions. First,

RST turns on the control logic which allows access to the shift register for the address/command

sequence. Second, the RST signal provides a method of terminating either single byte or multiple byte

data transfer.

A clock cycle is a sequence of a falling edge followed by a rising edge. For data inputs, data must be

valid during the rising edge of the clock and data bits are output on the falling edge of clock. If the RST

input is low all data transfer terminates and the I/O pin goes to a high impedance state. Data transfer is

illustrated in Figure 3. At power–up, RST must be a logic 0 until V

] 2.0 volts. Also SCLK must be at

a logic 0 when RST is driven to a logic 1 state.

DATA INPUT

Following the eight SCLK cycles that input a write command byte, a data byte is input on the rising edge

of the next eight SCLK cycles. Additional SCLK cycles are ignored should they inadvertently occur. Data

is input starting with bit 0.

DATA OUTPUT

Following the eight SCLK cycles that input a read command byte, a data byte is output on the falling

edge of the next eight SCLK cycles. Note that the first data bit to be transmitted occurs on the first falling

edge after the last bit of the command byte is written. Additional SCLK cycles retransmit the data bytes

should they inadvertently occur so long as RST remains high. This operation permits continuous burst

mode read capability. Also, the I/O pin is tri–stated upon each rising edge of SCLK. Data is output

starting with bit 0.

BURST MODE

Burst mode may be specified for either the clock/calendar or the RAM registers by addressing location 31

decimal (address/command bits 1 through 5 = logic 1). As before, bit 6 specifies clock or RAM and bit 0

specifies read or write. There is no data storage capacity at locations 9 through 31 in the Clock/Calendar

Registers or location 31 in the RAM registers. Reads or writes in burst mode start with bit 0 of address 0.

As in the case with the DS1202, when writing to the clock registers in the burst mode, the first eight

registers must be written in order for the data to be transferred. However, when writing to RAM in burst

mode it is not necessary to write all 31 bytes for the data to transfer. Each byte that is written to will be

transferred to RAM regardless of whether all 31 bytes are written or not.

剩余12页未读，继续阅读

xxping520

粉丝: 0
资源: 27

DS1302实时时钟芯片技术规格

DS1302_CONTROL.rar_DS1302.h_ds1302头文件

Arduino 例程详细教学32.DS1302时钟

DS1302.pdf

source_ds1302.rar_DS1302 VHDL_DS1302 verilog_FPGA DS1302_ds1302

new_ds1302.rar_DS1302程序_ds1302

102-DS1302.rar_ds1302

DS1302.zip_avr单片机ds1302

DS1302.zip_DS1302Z+arduino_arduino驱动ds1302_uno

51单片机DS1302 1602显示程ds1302.txt

DS1302.1.21.zip

最新资源