DS2423(3) One-Wire File System DS2423(3)NAMEDS2423 - 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 sequen‐
tially.
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 coun‐
ters.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 PROPERTIESALARMS
None.
DESCRIPTIONDS2423
The DS2423 (3) is used for its counters. The internal counters (associ‐
ated 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.
ADDRESSINGDATASHEET
http://pdfserv.maxim-ic.com/en/ds/DS2423.pdf
SEE ALSOAVAILABILITY
http://www.owfs.org
AUTHOR
Paul Alfille (paul.alfille@gmail.com)
OWFS Manpage 2003 DS2423(3)
