參數(shù)資料
型號: DS1992L-F5
英文描述: 1kbit/4kbit Memory iButtonTM DS1994 4-kbit Plus Time Memory iButtonTM
中文描述: 1kbit/4kbit內(nèi)存iButtonTM DS1994 4千位加時間內(nèi)存iButtonTM
文件頁數(shù): 6/17頁
文件大?。?/td> 223K
代理商: DS1992L-F5
DS1992/DS1993
Copy Scratchpad [55h]
This command is used to copy data from the scratchpad to memory. After issuing the copy scratchpad
command, the user must provide a 3-byte authorization pattern. This pattern must exactly match the data
contained in the three address registers (TA1, TA2, E/S, in that order). If the pattern matches, the AA
(Authorization Accepted) flag is set and the copy begins. A logic 0 is transmitted after the data has been
copied until the user issues a reset pulse. Any attempt to reset the part is ignored while the copy is in
progress. Copy typically takes 30 s.
6of 6
The data to be copied is determined by the three address registers. The scratchpad data from the
beginning offset through the ending offset is copied to memory, starting at the target address. Anywhere
from 1 to 32 Bytes can be copied to memory with this command. Whole Bytes are copied even if only
partially written. The AA flag is cleared only by executing a write scratchpad command.
Read Memory [F0h]
The read memory command can be used to read the entire memory. After issuing the command, the user
must provide the 2-Byte target address. After the two Bytes, the user reads data beginning from the target
address and may continue until the end of memory, at which point logic 1’s are read. It is important to
realize that the target address registers contains the address provided. The ending offset/data status Byte
is unaffected.
The hardware of the DS1992/DS1993 provides a means to accomplish error-free writing to the memory
section. To safeguard reading data in the 1-Wire environment and to simultaneously speed up data
transfers, it is recommended to packetize data into data packets of the size of one memory page each.
Such a packet would typically store a 16-bit CRC with each page of data to ensure rapid, error-free data
transfers that eliminate having to read a page multiple times to determine if the received data is correct or
not. (See Application Note 114 for the recommended file structure to be used with the 1-Wire
environment.)
相關(guān)PDF資料
PDF描述
DS21349DK T1/J1 Line Interface Unit Design Kit
DS2149DK T1/J1 Line Interface Unit Design Kit
DS21349 3.3V T1/J1 Line Interface Unit
DS2132AQN Solid-State Recorder
DS2132AN Solid-State Recorder
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1992L-F5/E00 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
DS1992L-F5+ 功能描述:iButton 1Kb/4Kb Memory iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated
DS1992LP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC
DS1992LR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC
DS1992P 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC