Rainbow-electronics DS2422 User Manual Page 31
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DS2422
31 of 48
Figure 12-4. Memory/Control Function Flow Chart
96H
Clear Mem.
[
w/PW
]
55H
Forced
Conversion?
Master TX
64-Bits
[
Password
]
N
Y
N
Y
Mission in
Progress?
DS2422 clears Mission
Time Stamp, Mission
Samples Counter,
Alarm Flags
DS2422 sets
MEMCLR = 1
Password
Accepted?
Master
TX Reset?
N
Y
N
Y
N
Y
Mission in
Progress?
DS2422 Performs a
Tem
p
. Conversion
DS2422 copies Result
to Address 020C/Dh
DS2422 Reads Serial
Data Interface
DS2422 copies Result
to Address 020E/Fh
N
Y
Master
TX Reset?
N
Y
Master TX
FFh dumm
y
b
y
te
Master TX
FFh dumm
y
b
y
te
From Figure 12
5
th
Part
To Figure 12
5
th
Part
To Figure 12
3
rd
Part
From Figure 12
3
rd
Part
- 1-Wire Temperature/Datalogger 1
- ELECTRICAL CHARACTERISTICS 2
- 3.5 4 4.5 3
- PIN DESCRIPTION 6
- DESCRIPTION 6
- APPLICATION 6
- OVERVIEW 8
- PARASITE POWER 9
- 64-BIT LASERED ROM 9
- Figure 5. 64-Bit Lasered ROM 10
- Figure 7. DS2422 Memory Map 10
- TIMEKEEPING AND CALENDAR 12
- SAMPLE RATE 13
- TEMPERATURE CONVERSION 13
- SERIAL DATA INPUT 14
- TEMPERATURE SENSOR ALARM 15
- SERIAL INPUT ALARM 15
- REAL-TIME CLOCK CONTROL 16
- MISSION CONTROL 17
- ALARM STATUS 18
- GENERAL STATUS 18
- MISSION START DELAY 19
- MISSION TIME STAMP 19
- MISSION PROGRESS INDICATOR 20
- OTHER INDICATORS 20
- SECURITY BY PASSWORD 20
- Password Control Register 21
- Read Access Password Register 21
- Full Access Password Register 21
- SERIAL DATA INTERFACE TUNING 22
- TEMPERATURE CONVERTER TRIM 22
- DATALOG MEMORY USAGE 22
- MISSIONING 24
- Figure 11. Address Registers 25
- WRITING WITH VERIFICATION 26
- READ SCRATCHPAD COMMAND [AAh] 26
- 28 of 48 28
- 29 of 48 29
- 30 of 48 30
- 31 of 48 31
- 32 of 48 32
- FORCED CONVERSION [55h] 33
- MEMORY ACCESS CONFLICTS 33
- 1-Wire BUS SYSTEM 34
- HARDWARE CONFIGURATION 34
- TRANSACTION SEQUENCE 35
- INITIALIZATION 35
- OVERDRIVE SKIP ROM [3Ch] 37
- OVERDRIVE MATCH ROM [69h] 37
- 38 of 48 38
- 39 of 48 39
- 1-Wire SIGNALING 40
- Read/Write Time Slots 40
- Master-to-Slave 41
- Slave-to-Master 41
- IMPROVED NETWORK BEHAVIOR 42
- CRC GENERATION 42
- READ SCRATCHPAD (CANNOT FAIL) 44
- STOP MISSION WITH PASSWORD 46
- PACKAGE INFORMATION 48
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