DS2505(3) One-Wire File System DS2505(3)NAME
DS2505, DS2505-UNW - Add-Only Memory (16 kBit), UniqueWare Add-Only
Memory (16 kBit)
DS1985, DS1985U
- Add-Only iButton (16 kBit), UniqueWare iButton (16 kBit)
SYNOPSIS
EPROM add-only memory.
0B [.]XXXXXXXXXXXX[XX][/[ memory | pages/page.[0-63|ALL] | ]]
8B [.]XXXXXXXXXXXX[XX][/[ memory | pages/page.[0-63|ALL] | ]]
FAMILY CODE
0B DS2505 DS1985
8B DS2505-UNW DS1985U
SPECIAL PROPERTIES
memory
read-write, binary
2048 bytes of memory. Initially all bits are set to 1. Writing zero
permanently alters the memory.
pages/page.0 ... pages/page.63 pages/page.ALL
read-write, yes-no
Memory is split into 64 pages of 32 bytes each. ALL is an aggregate of
the pages. Each page is accessed sequentially.
STANDARD PROPERTIESALARMS
None.
DESCRIPTION
DS2505 DS1985
The DS2505 (3) is used for write-once incremental storage. It's main
advantage is for audit trails (i.e. a digital purse).
The DS2505-UNW is one of the UniqueWare class of devices. Some of the
memory was preprogramed at the factory. See the datasheet for
specifics. The DS2502 , DS2505 , and DS2506 differ in their function by
the amount of on-board memory they possess. (The internal protocols are
slightly different, but the OWFS system handles this automatically.
ADDRESSINGDATASHEET
http://pdfserv.maxim-ic.com/en/ds/DS2505.pdf
http://pdfserv.maxim-ic.com/en/ds/DS2502-UNW-DS2506S-UNW.pdf
http://pdfserv.maxim-ic.com/en/ds/DS1985-F3-DS1985-F5.pdf
http://pdfserv.maxim-ic.com/en/ds/DS1982U-DS1986U.pdf
SEE ALSOAVAILABILITY
http://www.owfs.org
AUTHOR
Paul Alfille (paul.alfille@gmail.com)
OWFS Manpage 2003 DS2505(3)