Datasheet

DS1921H/Z
34 of 45
Command-Specific 1-Wire Communication Protocol — Color Codes
Master to slave Slave to master
Write Scratchpad, reaching the end of the Scratchpad
RST PD Select WS TA <data to EOS> CRC16\ FF loop
Write Scratchpad, not reaching the end of the Scratchpad
RST PD Select WS TA <data> RST PD
Read Scratchpad
RST PD Select RS TA-E/S <data to EOS> CRC16\ FF loop
Copy Scratchpad (success)
RST PD Select CPS TA-E/S Busy AA loop
Copy Scratchpad (invalid TA-E/S)
RST PD Select CPS TA-E/S FF loop
Read Memory (success)
RST PD Select RM TA <data to EOM> 00 loop
Read Memory (invalid address)
RST PD Select RM TA 00 loop
Reading reserved pages 20 through 63 or 68 through 127 or pages 192 and higher (beyond datalog
memory) will result in 00h bytes.
Read Memory with CRC (success)
RST PD Select RMC TA <data to EOP> CRC16\ <32 bytes> CRC16\
The "32 bytes" are either valid page data or 00h bytes when reading reserved pages 20 through 63 or 68
through 127 or pages 192 and higher (beyond datalog memory).
Loop