DS1923 Maxim, DS1923 Datasheet - Page 46

• Manufacturer Part Number: DS1923
• Description: The DS1923 temperature/humidity logger iButton® is a rugged, self-sufficient system that measures temperature and/or humidity and records the result in a protected memory section
• Manufacturer: Maxim

Hygrochron Temperature/Humidity Logger
iButton with 8KB Data-Log Memory
46
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
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