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DS2415(3)		     One-Wire File System		     DS2415(3)

NAME
       DS2415 /- 1-Wire Time Chip

       DS1904 /- RTC (real time clock) iButton

       DS2417 /- 1-Wire Time Chip with Interrupt

SYNOPSIS
       Real time clock.
       24 [.]XXXXXXXXXXXX[XX][/[ date | flags | running | udate | ]]

       Clock with interrupts
       27  [.]XXXXXXXXXXXX[XX][/[ date | enable | interval | itime | running |
       udate | ]]

FAMILY CODE
       24     DS2415 DS1904

       27     DS2417

SPECIAL PROPERTIES
   date
       read-write, ascii
       26 character date representation of the counter value. Increments  once
       per second while running
       Setting date to a null string will put the current system time.
       Accepted date formats are:
	 Sat[urday] March 12 12:23:59 2001
	 Apr[il] 4 9:34:56 2002
	 3/23/04 23:34:57
	 current locale setting (your system's format)

   enable
       read-write, yes-no
       State of the timer interrupt. 0=off 1=running.

   interval
       read-write, unsigned integer
       Interval	 between  timer	 interrupts.  Values:  0-7.  See  table	 under
       DESCRIPTION for interpretation.	itime will reflect the	interval  cho‐
       sen.

   itime
       read-write, unsigned integer
       Interval	 between  timer	 interrupts. Value in seconds. See table under
       DESCRIPTION for interpretation and acceptable  values.	interval  will
       reflect the itime chosen.

   flags
       read-write, unsigned integer
       General use data. 4 bits (0-15 accepted values).

   running
       read-write, yes-no
       State of the clock. 0=off 1=running.

   udate
       read-write, unsigned integer
       Time  represented as a number.  udate increments once per second, while
       running is on.
       Usually set to unix time standard: number of seconds since Jan 1, 1970.
       The  date  field	 will  be the unix representation of udate and setting
       either will change the other.

STANDARD PROPERTIES
ALARMS
       None implemented.

DESCRIPTION
   DS2415 DS1904
       The DS2415 (3) and DS1904 (3) are simple clocks that can be read on the
       1-wire bus. They can also be used the time an event, for remote confir‐
       mation.

   DS2417
       The DS2417 has the same clock function, but also	 includes  a  program‐
       mable interval interrupt. Values Allowed are:
       0 1sec
       1 4sec
       2 32s = .5m
       3 6 = 1m
       4 2048s = .5h
       5 4096s = 1h
       6 65536s = 18h
       7 131072s = 36h

ADDRESSING
DATASHEET
       http://pdfserv.maxim-ic.com/en/ds/DS2415.pdf
       http://pdfserv.maxim-ic.com/en/ds/DS1904.pdf
       http://pdfserv.maxim-ic.com/en/ds/DS2417.pdf

SEE ALSO
AVAILABILITY
       http://www.owfs.org

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

OWFS Manpage			     2003			     DS2415(3)

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