DS1620 Datasheet, PDF (8/13 Pages) Dallas Semiconductor – Digital Thermometer and Thermostat

DS1620 COMMAND SET Table 3
3-WIRE BUS
DATA AFTER
ISSUING
INSTRUCTION DESCRIPTION
PROTOCOL PROTOCOL
TEMPERATURE CONVERSION COMMANDS
Read Temperature Reads last converted temperature
AAh
<read data>
value from temperature register.
Read Counter Reads value of count remaining
A0h
<read data>
from counter.
Read Slope Reads value of the slope
A9h
<read data>
accumulator.
Start Convert T Initiates temperature conversion.
EEh
Idle
Stop Convert T Halts temperature conversion.
22h
Idle
THERMOSTAT COMMANDS
Write TH
Writes high temperature limit value
01h
<write data>
into TH register.
Write TL
Writes low temperature limit value
02h
<write data>
into TL register.
Read TH
Reads stored value of high
A1h
<read data>
temperature limit from TH register.
Read TL
Reads stored value of low
A2h
<read data>
temperature limit from TL register.
Write Config Writes configuration data to
0Ch
<write data>
configuration register.
Read Config Reads configuration data from
ACh
<read data>
configuration register.
DS1620
NOTES
1
1
2
2
2
2
2
2
NOTES:
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 typically requires 10 ms at room temperature. After issuing a write command no
further writes should be requested for at least 10 ms.
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