DS1615

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TLIE - Temperature Low Interrupt Enable - When set to a logic 1, this bit permits the Temperature Low

THIE - Temperature High Interrupt Enable - When set to a logic 1, this bit permits the Temperature High

AIE - Alarm Interrupt Enable - When set to a logic 1, this bit permits the Alarm Flag (ALMF) in the

signal.

STATUS REGISTER

MSb

LSb

TR

MEMCL

MIP

SIP

LOBAT

TLF

THF

ALMF

TR - Temperature Ready This bit indicates the status of the temperature value in the Current Temperature

register after the Read Temperature command has been executed. When this bit is a logic 1, the DS1615

has completed the temperature measurement and has written a valid value to the Current Temperature

register. When this bit is a logic 0, the temperature measurement has not been completed. This bit is

cleared to 0 when the Read Temperature command is sent.

MEM CLR - Memory Cleared This bit indicates that the datalog memory, histogram memory,

Temperature Alarm, Current Samples, Start Time Stamp, Start Delay, and Sample Rate registers are all

cleared to zero. MEM CLR is cleared to 0 when a datalog mission is started (i.e., MIP = 1).

MIP - Mission in Progress This bit indicates the sampling status of the DS1615. If MIP is a logic 1, the

device is currently on a mission in which it is operating in the datalogging mode. The MIP bit is changed

to a logic 1 immediately following 1) the writing of a non-zero value to the Sample Rate register when

value AND the SE bit is a 1.

If MIP is a logic 0, the DS1615 is not currently in datalogging mode. The MIP bit transitions from a

logic 1 to a logic 0 whenever datalogging is stopped. Datalogging is stopped when the DS1615 is cleared

via the clear bit and clear instruction or when any of the RTC or Control registers (with the exception of

the Status register) are written to during a mission. The MIP bit can also be written to a logic 0 by the

end user to stop datalogging. It cannot, however, be written to a logic 1.

SIP - Sample in Progress This bit indicates that the DS1615 is currently in the process of acquiring a

temperature sample. When the SIP bit is 0, a temperature conversion is not currently in process and the

next conversion will not begin for at least 250 ms. When the SIP bit is a 1, a temperature conversion is in

progress and no registers or memory locations should be read or written. The SIP bit will be a 1 for a

maximum of 750 ms.

LOBAT - Low Battery Flag - This bit reflects the status of the backup power source connected to the