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DS2423(3)                    One-Wire File System                    DS2423(3)


NAME

       DS2423 - 4kbit 1-Wire RAM with Counter


SYNOPSIS

       RAM and counters.

       1D [.]XXXXXXXXXXXX[XX][/[ counter.[A|B|ALL] | memory |
       pages/page.[0-15|ALL] | pages/count.[0-15|ALL] |

       See the file man3/standard_mini.3so.

       ]]


FAMILY CODE

       1D


SPECIAL PROPERTIES

   counter.A counter.B counter.ALL
       read-only, unsigned integer
       Debounced external counter. Associated with RAM page.14 and page.15
       Note: counter increments only. It is reset when the chip loses power.
       ALL returns the two values, separated by a comma. They are read
       sequentially.

       The property was called counters prior to OWFS version 2.9p1 and the
       old name is invisibly recognized for backwards compatibility.

   memory
       read-write, binary
       512 bytes of memory.

   pages/page.0 ... pages/page.15 pages/page.ALL
       read-write, binary
       Memory is split into 16 pages of 32 bytes each. Memory is RAM, contents
       are lost when power is lost.  ALL is an aggregate of the pages. Each
       page is accessed sequentially.

   pages/count.0 ... pages/count.15 pages/count.ALL
       read-only, unsigned integer

       Write access to each page of memory. Actually only page.12 and page.13
       have write counters.
       page14 and page.15 's counters are associated with the external
       counters.A and counters.B triggers.
       The value 0xFFFFFFFF is returned for pages/count.0 through
       pages/count.11
       ALL is an aggregate of the counters, comma separated. Each page is
       accessed sequentially.


STANDARD PROPERTIES

       See the file man3/standard.3so.


ALARMS

       None.


DESCRIPTION

       See the file man3/description.3so.

   DS2423
       The DS2423 (3) is used for its counters. The internal counters
       (associated with pages 12 and 13) can detect memory tampering.

       The external counters A and B page been used in circuit design, such as
       a wind anometer.  OWFS system handles this automatically.


ADDRESSING

       See the file man3/addressing.3so.


DATASHEET

       http://pdfserv.maxim-ic.com/en/ds/DS2423.pdf


SEE ALSO

       See the file man3/seealso.3so.


AVAILABILITY

       http://www.owfs.org


AUTHOR

       Paul Alfille (paul.alfille@gmail.com)

OWFS Manpage                         2003                            DS2423(3)

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