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] | ]]

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

ALARMS
None.

DESCRIPTION

  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

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

SEE ALSO

AVAILABILITY
http://www.owfs.org

AUTHOR
Paul Alfille (paul.alfille@gmail.com)