Rainbow-electronics DS2422 Manual do Utilizador descarregar pdf (Página 46)

DS2422

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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

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Rainbow-electronics DS2422 Manual do Utilizador Página 46