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DS1985
If a Page Address Redirection Byte has a FFH value, the data in the main memory that corresponds to that
page is valid. If a Page Address Redirection Byte has some other hex value, the data in the page
corresponding to that redirection byte is invalid, and the valid data can now be found at the one’s
complement of the page address indicated by the hex value stored in the associated Page Address
Redirection Byte. A value of FDH in the redirection byte for page 1, for example, would indicate that the
updated data is now in page 2. The details for reading and programming the EPROM status memory
portion of the DS1985 are given in the Memory Function Commands section.
DS 1985 MEMORY MAP Figure 4
8-BIT
SCRATCHPAD
88 BYTES
STATUS MEMORY
REDIRECTION
BYTES
BIT MAP OF
USED PAGES
WRITE-PROTECT BITS
REDIRECTION BYTES
WRITE-PROTECT BITS
DATA MEMORY
STATUS MEMORY MAP
BIT 0 OF ADDRESS 000H=
WRITE PROTECT
OF PAGE 0, ETC.
ADDRESS 100H=PAGE ADDRESS
REDIRECTION BYTE FOR PAGE 0, ETC .
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相关代理商/技术参数
DS1985-F5 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1985-F5# 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1985-F5+ 功能描述:iButton 16Kb Add-Only iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1985U 制造商:未知厂家 制造商全称:未知厂家 功能描述:UniqueWare iButton
DS1985U-F5-117D+ 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1986 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:64-kbits Add-Only iButton⑩
DS1986+F3 制造商:Maxim Integrated Products 功能描述:ADD-O IBTN 64KB, F3 (GENERIC) LFREE - Rail/Tube
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