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| 型号： | DS1244YP-70+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/20页 |
| 文件大小： | 0K |
| 描述： | IC NVSRAM 256KBIT 70NS 34PCM |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 40 |
| 类型： | Phantom 计时芯片 |
| 特点： | 闰年，NVSRAM |
| 存储容量： | 32KB |
| 时间格式： | HH:MM:SS:hh（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 电压 - 电源，电池： | 3V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 34-PowerCap? 模块 |
| 供应商设备封装： | 34-PowerCap 模块 |
| 包装： | 管件 |
DS1244/DS1244P
6 of 20
PHANTOM CLOCK REGISTER INFORMATION
The phantom clock information is contained in eight registers of 8 bits, each of which is sequentially
accessed 1 bit at a time after the 64-bit pattern recognition sequence has been completed. When updating
the phantom clock registers, each register must be handled in groups of 8 bits. Writing and reading
individual bits within a register could produce erroneous results. These read/write registers are defined in
Figure 2.
Data contained in the phantom clock register is in binary coded decimal (BCD) format. Reading and
writing the registers is always accomplished by stepping through all eight registers, starting with bit 0 of
register 0 and ending with bit 7 of register 7.
Figure 1. PHANTOM CLOCK REGISTER DEFINITION
NOTE: THE PATTERN RECOGNITION IN HEX IS C5, 3A, A3, 5C, C5, 3A, A3, 5C. THE ODDS OF THIS PATTERN BEING
ACCIDENTALLY DUPLICATED AND CAUSING INADVERTENT ENTRY TO THE PHANTOM CLOCK IS LESS THAN 1 IN
1019. THIS PATTERN IS SENT TO THE PHANTOM CLOCK LSB TO MSB.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1244YP-70+ | 功能描述:实时时钟 256k NV SRAM w/Phantom Clock 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 |
| DS-1244ZJ | 制造商:Hikvision USA 功能描述:DOME CAM CEILING TRIM BRACKET4.75IN X .95IN 制造商:HIKVISION 功能描述:DOME CAM CEILING TRIM BRACKET 4.75IN X .95IN |
| DS1245 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3.3V 1024k Nonvolatile SRAM |
| DS1245AB | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1024k Nonvolatile SRAM |
| DS1245AB-100 | 功能描述:NVRAM 1024K SRAM Nonvolatile RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube |
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