DS2423 − 4kbit 1-Wire RAM with Counter
RAM and counters.
1D [.]XXXXXXXXXXXX[XX][/[ counter.[A|B|ALL] | memory | pages/page.[0-15|ALL] | pages/count.[0-15|ALL] | ]]
1D
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.
read-write,
binary
512 bytes of memory.
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.
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.
None.
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.
http://pdfserv.maxim-ic.com/en/ds/DS2423.pdf
http://www.owfs.org
Paul Alfille ([email protected])