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参数资料
| 型号： | DS1689S-TRL |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/36页 |
| 文件大小： | 0K |
| 描述： | IC RTC SER W/NV RAM CTRL 28-SOIC |
| 标准包装： | 1,000 |
| 类型： | 时钟/日历 |
| 特点： | NVSRAM |
| 存储容量： | 114B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 2.7 V ~ 3.3 V，4.5 V ~ 5.5 V |
| 电压 - 电源，电池： | 2.5 V ~ 3.7 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC |
| 包装： | 管件 |
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DS1689/DS1693
16 of 36
EXTENDED FUNCTIONS
The extended functions provided by the DS1689/DS1693 that are new to the RAMified RTC family are
accessed via a software-controlled bank-switching scheme, as illustrated in Figure 4. In bank 0, the
clock/calendar registers and 50 bytes of user RAM are in the same locations as for the DS1287. As a
result, existing routines implemented within BIOS, DOS, or application software packages can gain
access to the DS1689/DS1693 clock registers with no changes. Also in bank 0, an extra 64 bytes of RAM
are provided at addresses just above the original locations for a total of 114 directly addressable bytes of
user RAM.
When bank 1 is selected, the clock/calendar registers and the original 50 bytes of user RAM still appear
as bank 0. However, the Dallas registers which provide control and status for the extended functions will
be accessed in place of the additional 64 bytes of user RAM. The major extended functions controlled by
the Dallas registers are listed below:
1. Silicon Revision byte
2. Serial Number
3. 8-Byte Customer Specific ROM or Serial Number
4. Century counter
5. Auxiliary Battery Control/Status
6. Wake-Up
7. Kickstart
8. RAM Clear Control/Status
9. VCC Powered Elapsed Time Counter
10. VBAT Powered Elapsed Time Counter
11. Power-on Cycle Counter
The bank selection is controlled by the state of the DV0 bit in Register A. To access bank 0 the DV0 bit
should be written to 0. To access bank 1, DV0 should be written to 1. Register locations designated as
reserved in the bank 1 map are reserved for future use by Dallas Semiconductor. Bits in these locations
cannot be written and return a 0 if read.
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相关代理商/技术参数 |
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| DS1691 | 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 |
| DS1691 WAF | 制造商:Texas Instruments 功能描述: |
| DS1691/1692 WAF | 制造商:Texas Instruments 功能描述: |
| DS1691A | 制造商:NSC 制造商全称:National Semiconductor 功能描述:(RS-422/RS-423) Line Drivers with TRI-STATE Outputs |
| DS1691AJ/883 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:(RS-422/RS-423) Line Drivers with TRI-STATE Outputs |
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