DS1922L/DS1922T
iButton Temperature Loggers
with 8KB Data-Log Memory
FROM FIGURE 9b
CCh
START MISSION
N
33h
STOP MISSION
N
[WITH PW]
MISSION START
[WITH PW]
Y
DELAY PROCESS
Y
MASTER Tx
64 BITS [PASSWORD]
START DELAY
COUNTER = 0?
Y
MASTER Tx
64 BITS [PASSWORD]
MASTER Tx
FFh DUMMY BYTE
N
DS1922 WAITS FOR 1 MINUTE
MASTER Tx
FFh DUMMY BYTE
N
PASSWORD
ACCEPTED?
DS1922 DECREMENTS
START DELAY COUNTER
PASSWORD
ACCEPTED?
N
Y
Y
Y
MISSION IN
PROGRESS?
SUTA = 1?
N
MISSION IN
PROGRESS?
N
N
Y
Y
N
MEMCLR = 1?
DS1922 SETS WFTA = 1
DS1922 SETS
MIP = 0,
WFTA = 0
DS1922 WAITS ONE
Y
DS1922 SETS
SAMPLE PERIOD
MIP = 1,
MEMCLR = 0
Y
MIP = 0?
MASTER Tx RESET?
N
DS1922 INITIATES MISSION
N
Y
START DELAY PROCESS
DS1922 PERFORMS 8-BIT
TEMPERATURE CONVERSION
N
MASTER Tx RESET?
TEMPERATURE
N
ALARM?
Y
Y
DS1922 SETS WFTA = 0
DS1922 WAITS ONE
SAMPLE PERIOD
DS1922 COPIES RTC DATA TO
MISSION TIMESTAMP REGISTER
DS1922 STARTS LOGGING
TAKING FIRST SAMPLE
END OF PROCESS
TO FIGURE 9b
Figure 9c. Memory/Control Function Flowchart (continued)
Maxim Integrated
33
相关PDF资料
DS1923-F5# IBUTTON TEMP/HUMIDITY LOGGER F5
DS1961S-F3# IBUTTON EEPROM 1KBit F3
DS1963S-F5+ IBUTTON MONETARY SHA-1
DS1971-F3+ IBUTTON EEPROM 256KBIT F3
DS1972-F3+ IBUTTON EEPROM 1KBit F3
DS1973-F3+ IBUTTON EEPROM 4KBit F3
DS1977-F5# IBUTTON EEPROM 32KBit F5
DS1982-F5+ IBUTTON 1KBit ADD-ONLY F5
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