DS2422 Maxim, DS2422 Datasheet - Page 46

• Manufacturer Part Number: DS2422
• Description: The DS2422 temperature/data logger combines the core functions of a fully featured data logger in a single chip
• Manufacturer: Maxim

STOP MISSION WITH PASSWORD
To verify success, read the General Status Register at address 0215h. If MIP is 0, the command was executed
successfully.
MISSION EXAMPLE: PREPARE AND START A NEW MISSION
Assumption: The previous mission has been ended by using the Stop Mission command. Passwords are not
enabled.
Starting a mission with the DS2422 requires three steps:
STEP 1
Clear the previous mission.
With only a single DS2422 connected to the bus master, the communication of step 1 looks like this:
RST
Step 1: clear the data of the previous mission
Step 2: write the setup data to register page 1
Step 3: start the mission
MASTER MODE
PD
RX
RX
TX
TX
TX
TX
TX
TX
Select
STP
<PW/dummy>
DATA (LSB FIRST)
<8 FFh bytes>
(Presence)
(Presence)
(Reset)
(Reset)
CCh
FFh
96h
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FFh
FF loop
Reset pulse
Presence pulse
Issue “skip ROM” command
Issue “clear memory” command
Send dummy password
Send dummy byte
Reset pulse
Presence pulse
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