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參數資料
| 型號： | DS1244YP-70+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 17/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC NVSRAM 256KBIT 70NS 34PCM |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 40 |
| 類型： | Phantom 計時芯片 |
| 特點： | 閏年，NVSRAM |
| 存儲容量： | 32KB |
| 時間格式： | HH:MM:SS:hh（12/24 小時） |
| 數據格式： | YY-MM-DD-dd |
| 接口： | 并聯 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 電壓 - 電源，電池： | 3V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 34-PowerCap? 模塊 |
| 供應商設備封裝： | 34-PowerCap 模塊 |
| 包裝： | 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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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS1244YP-70+ | 功能描述:實時時鐘 256k NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝: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 制造商全稱:Dallas Semiconductor 功能描述:3.3V 1024k Nonvolatile SRAM |
| DS1245AB | 制造商:DALLAS 制造商全稱: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 數據總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
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