DS1921Z Maxim, DS1921Z Datasheet - Page 21
DS1921Z
Manufacturer Part Number
DS1921Z
Description
The DS1921H/Z Thermochron® iButtons® are rugged, self-sufficient systems that measure temperature and record the result in a protected memory section
Manufacturer
Maxim
Datasheet
1.DS1921H.pdf
(45 pages)
- Current page: 21 of 45
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MEMORY/CONTROL FUNCTION FLOW CHART Figure 10-4
From Figure 10
To Figure 10
3
3
rd
rd
Part
Part
DS1921 clears Alarm Time
N
DS1921 clears Mission
Stamps and Durations
Sample Rate Register
Time Stamp, Mission
Mission Start Delay,
Histogram Memory
Samples Counter,
DS1921 clears
EMCLR = 1?
MEMCLR = 1
DS1921 sets
DS1921 sets
EMCLR = 0
TX Reset?
Memory
Master
Clear
3CH
Y
Y
Y
N
N
Y
N
Conversion Process
21 of 45
DS1921 Starts
DS1921 sets
Temperature
EMCLR = 0
TX Reset?
Progress?
Mission in
Convert
Master
Temp.
44H
Y
Y
N
N
DS1921 copies Result
DS1921 Performs a
Temp. Conversion
to Address 0211h
Temperature Con-
version Process
End of Process
DS1921 sets
DS1921 sets
TCB\ = 0
TCB\ = 1
N
TX Reset?
Master
Y
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