Rainbow Electronics DS2422 - Manual (Page 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
Transfer of as many data bytes as are needed to reach the scratchpad offset 1Fh
Transfer of as many data bytes as are needed to reach the end of a memory page
Transfer of as many data bytes as are needed to reach the end of the datalog memory
Transfer of 8 bytes that either represent a valid password or acceptable dummy data
<32 bytes> Transfer of 32 bytes
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 CRC16\ FF loop
READ SCRATCHPAD (CANNOT FAIL)
RST PD Select RS TA-E/S CRC16\ FF loop