Mission example: prepare and start a new mission, Step 1 – Rainbow Electronics DS2422 User Manual
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DS2422
46 of 48
STOP MISSION WITH PASSWORD
RST
PD
Select
STP
<PW/dummy>
FFh
FF loop
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 data of the previous mission
Step 2: write the setup data to register page 1
Step 3: start the mission
STEP 1
Clear the previous mission.
With only a single DS2422 connected to the bus master, the communication of step 1 looks like this:
MASTER MODE
DATA (LSB FIRST)
COMMENTS
TX
(Reset)
Reset pulse
RX
(Presence)
Presence pulse
TX
CCh
Issue “skip ROM” command
TX
96h
Issue “clear memory” command
TX
<8 FFh bytes>
Send dummy password
TX
FFh
Send dummy byte
TX
(Reset)
Reset pulse
RX
(Presence)
Presence pulse