DS1922E Maxim, DS1922E Datasheet - Page 26
![no-image](/images/no-image-200.jpg)
DS1922E
Manufacturer Part Number
DS1922E
Description
The DS1922E temperature logger iButton is a rugged, self-sufficient system that measures temperature and records the result in a protected memory section
Manufacturer
Maxim
Datasheet
1.DS1922E.pdf
(44 pages)
- Current page: 26 of 44
- Download datasheet (414Kb)
High-Temperature Logger iButton with 8KB
Data-Log Memory
Figure 9c. Memory/Control Function Flowchart (continued)
26
______________________________________________________________________________________
FROM FIGURE 9b
TO FIGURE 9b
N
Y
N
N
DS1922E INITIATES MISSION
START DELAY PROCESS
64 BITS [PASSWORD]
MASTER Tx RESET?
FFh DUMMY BYTE
START MISSION
DS1922E SETS
MEMCLR = 1?
MEMCLR = 0
PASSWORD
ACCEPTED?
PROGRESS?
MASTER Tx
MASTER Tx
MISSION IN
[WITH PW]
MIP = 1,
CCh
Y
Y
N
Y
Y
N
Y
MISSION TIMESTAMP REGISTER
DS1922E WAITS FOR 1 MINUTE
DS1922E COPIES RTC DATA TO
TEMPERATURE CONVERSION
DS1922E STARTS LOGGING
DS1922E PERFORMS 8-BIT
START DELAY COUNTER
DS1922E SETS WFTA = 1
DS1922E SETS WFTA = 0
DS1922E DECREMENTS
TAKING FIRST SAMPLE
DS1922E WAITS ONE
DS1922E WAITS ONE
END OF PROCESS
DELAY PROCESS
SAMPLE PERIOD
SAMPLE PERIOD
MISSION START
COUNTER = 0?
TEMPERATURE
START DELAY
SUTA = 1?
MIP = 0?
ALARM?
N
Y
N
Y
Y
N
N
64 BITS [PASSWORD]
MASTER Tx RESET?
FFh DUMMY BYTE
STOP MISSION
DS1922E SETS
ACCEPTED?
PROGRESS?
MASTER Tx
MASTER Tx
PASSWORD
MISSION IN
[WITH PW]
WFTA = 0
MIP = 0,
33h
Y
Y
Y
Y
N
N
N
N
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