DS2415 - 1-Wire Time Chip, RTC (real time clock) iButton, 1-Wire Time Chip with Interrupt

NAME SYNOPSIS FAMILY CODE SPECIAL PROPERTIES date enable interval itime flags running udate STANDARD PROPERTIES ALARMS DESCRIPTION DS2415 DS1904 DS2417 ADDRESSING DATASHEET SEE ALSO AVAILABILITY AUTHOR

NAME

DS2415, DS1904, DS2417 − 1-Wire Time Chip, RTC (real time clock) iButton, 1-Wire Time Chip with Interrupt

SYNOPSIS

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

FAMILY CODE

	24		DS2415 DS1904
	27		DS2417

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 chosen.

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 confirmation.

DS2417

The DS2417 has the same clock function, but also includes a programmable 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