DS1922E Maxim, DS1922E Datasheet - Page 39

• Manufacturer Part Number: DS1922E
• Description: The DS1922E temperature logger iButton is a rugged, self-sufficient system that measures temperature and records the result in a protected memory section
• Manufacturer: Maxim

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