Datasheet

DS1922L/DS1922T
Temperature Logger iButton with 8KB
Data-Log Memory
46 ______________________________________________________________________________________
RST
Write Scratchpad, Reaching the End of the Scratchpad (Cannot Fail)
PD WS TASelect CRC-16 FF Loop<Data to EOS>
CRC-16 FF Loop
CRC-16
RST
Read Scratchpad (Cannot Fail)
PD RS TA-E/SSelect <Data to EOS>
AA Loop
RST
Copy Scratchpad with Password (Success)
PD CPS TA-E/SSelect <PW/Dummy>
FF Loop
FF Loop
Loop
RST
Copy Scratchpad with Password (Fail TA-E/S or Password)
PD CPS TA-E/SSelect <PW/Dummy>
FF Loop
FF Loop
RST
Read Memory with Password and CRC (Fail Password or Address)
PD RMC
FFh
Select <PW/Dummy>
RST TA
TA
Read Memory with Password and CRC (Success)
PD RMCSelect <PW/Dummy> <Data to EOP>
RST CM
Clear Memory with Password
PD Select <PW/Dummy>
CRC-16
<32 Bytes>
To verify success, read the General Status register at address 0215h. If MEMCLR is 1, the command was
executed successfully.
Command-Specific 1-Wire Communication Protocol—Color Codes
Master-to-Slave Slave-to-Master
1-Wire Communication Examples