Datasheet

DS1921H/Z
21 of 45
MEMORY/CONTROL FUNCTION FLOW CHART Figure 10-4
3CH
Clear
Memory
EMCLR = 1?
DS1921 clears Mission
Time Stamp, Mission
Samples Counter,
Mission Start Delay,
Sample Rate Register
DS1921 sets
EMCLR = 0
44H
Convert
Temp.
Master
TX Reset?
DS1921 Starts
Temperature
Conversion Process
Master
TX Reset?
Mission in
Progress?
N
Y
N
Y
N
Y
N
Y
N
Y
N
Y
DS1921 sets
MEMCLR = 1
DS1921 clears
Histogram Memory
DS1921 clears Alarm Time
Stamps and Durations
DS1921 sets
EMCLR = 0
Master
TX Reset?
N
Y
From Figure 10
3
rd
Part
To Figure 10
3
rd
Part
DS1921 sets
TCB\ = 0
DS1921 Performs a
Temp. Conversion
DS1921 copies Result
to Address 0211h
DS1921 sets
TCB\ = 1
Temperature Con-
version Process
End of Process