DS1621
Table 3. DS1621 COMMAND SET
2-WIRE BUS DATA
AFTER ISSUING
PROTOCOL
INSTRUCTION
DESCRIPTION
PROTOCOL
NOTES
TEMPERATURE CONVERSION COMMANDS
Read Temperature Read last converted temperature
value from temperature register.
Read Counter
Read Slope
AAh
<read 2 bytes data>
Reads value of Count_Remain
Reads value of the
A8h
A9h
<read data>
<read data>
Count_Per_C
Start Convert T
Stop Convert T
Access TH
Initiates temperature
conversion.
EEh
22h
idle
idle
1
1
2
Halts temperature conversion.
THERMOSTAT COMMANDS
Reads or writes high
A1h
A2h
ACh
<write data>
temperature limit value into TH
register.
Access TL
Reads or writes low
<write data>
<write data>
2
2
temperature limit value into TL
register.
Access Config
NOTES:
Reads or writes configuration
data to configuration register.
1. In continuous conversion mode a Stop Convert T command will halt continuous conversion. To
restart the Start Convert T command must be issued. In one-shot mode a Start Convert T command
must be issued for every temperature reading desired.
2. Writing to the E2 requires a maximum of 10ms at room temperature. After issuing a write command,
no further writes should be requested for at least 10ms.
11 of 16
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
