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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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