DS18S20-PAR
DS18S20-PAR FUNCTION COMMAND SET Table 4
1-Wire Bus Activity
Command
Description Protocol
After Command is Issued
Notes
TEMPERATURE CONVERSION COMMANDS
Convert T
Initiates temperature
44h None
1
conversion.
MEMORY COMMANDS
Recall E
Read Scratchpad
Write Scratchpad
Copy Scratchpad
2
Reads the entire scratchpad
including the CRC byte.
Writes data into scratchpad
bytes 2 and 3 (T H and T L ).
Copies T H and T L data from the
scratchpad to EEPROM.
Recalls T H and T L data from
EEPROM to the scratchpad.
BEh DS18S20-PAR transmits up
to 9 data bytes to master.
4Eh Master transmits 2 data
bytes to DS18S20-PAR.
48h None
B8h DS18S20-PAR transmits
recall status to master.
2
3
1
NOTES:
1. The master must enable a strong pullup on the 1-Wire bus during temperature conversions and copies
from the scratchpad to EEPROM. No other bus activity may take place during this time.
2. The master can interrupt the transmission of data at any time by issuing a reset.
3. Both bytes must be written before a reset is issued.
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