Rainbow-electronics DS2422 Manuale Utente Scaricare il pdf (Pagina 44)

DS2422

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COMMAND-SPECIFIC 1-Wire COMMUNICATION PROTOCOL—LEGEND

SYMBOL DESCRIPTION

RST 1-Wire Reset Pulse generated by master

PD 1-Wire Presence Pulse generated by slave

Select Command and data to satisfy the ROM function protocol

WS Command "Write Scratchpad"

RS Command "Read Scratchpad"

CPS Command "Copy Scratchpad with Password"

RM Command "Read Memory with Password"

RMC Command "Read Memory with Password & CRC"

CM Command "Clear Memory with Password "

FC Command "Forced Conversion"

SM Command "Start Mission with Password"

STP Command "Stop Mission with Password"

TA Target Address TA1, TA2

TA-E/S Target Address TA1, TA2 with E/S byte

<data to EOS> Transfer of as many data bytes as are needed to reach the scratchpad offset 1Fh

<data to EOP> Transfer of as many data bytes as are needed to reach the end of a memory page

<data to EOM> Transfer of as many data bytes as are needed to reach the end of the datalog memory

<PW/dummy> Transfer of 8 bytes that either represent a valid password or acceptable dummy data

<32 bytes> Transfer of 32 bytes

<data> Transfer of an undetermined amount of data

FFh Transmission of one byte FFh

CRC16\ Transfer of an inverted CRC16

FF loop Indefinite loop where the master reads FF bytes

AA loop Indefinite loop where the master reads AA bytes

COMMAND-SPECIFIC 1-Wire COMMUNICATION PROTOCOL—COLOR CODES

Master to slave Slave to master

WRITE SCRATCHPAD, REACHING THE END OF THE SCRATCHPAD (CANNOT FAIL)

RST PD Select WS TA <data to EOS> CRC16\ FF loop

READ SCRATCHPAD (CANNOT FAIL)

RST PD Select RS TA-E/S <data to EOS> CRC16\ FF loop

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Rainbow-electronics DS2422 Manuale Utente Pagina 44