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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] |

       See the file man3/standard_mini.3so.

       ]]

       8B [.]XXXXXXXXXXXX[XX][/[ memory | pages/page.[0-63|ALL] |

       See the file man3/standard_mini.3so.

       ]]


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 PROPERTIES

       See the file man3/standard.3so.


ALARMS

       None.


DESCRIPTION

       See the file man3/description.3so.

   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.


ADDRESSING

       See the file man3/addressing.3so.


DATASHEET

       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 ALSO

       See the file man3/seealso.3so.


AVAILABILITY

       http://www.owfs.org


AUTHOR

       Paul Alfille (paul.alfille@gmail.com)

OWFS Manpage                         2003                            DS2505(3)

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