Rainbow Electronics DS1621 - Manual (Page 11)

DS1621
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measurement will be completed and the DS1621 will remain idle until a Start Convert T is issued to
resume continuous operation.
DS1621 COMMAND SET Table 3
INSTRUCTION DESCRIPTION PROTOCOL
2-WIRE BUS DATA
AFTER ISSUING
PROTOCOL NOTES
TEMPERATURE CONVERSION COMMANDS
Read Temperature Read last converted temperature
value from temperature register. AAh <read 2 bytes data>
Read Counter Reads value of count remaining
from counter. A8h <read data>
Read Slope Reads value of the slope
accumulator. A9h <read data>
Start Convert T Initiates temperature
conversion. EEh idle 1
Stop Convert T Halts temperature conversion. 22h idle 1
THERMOSTAT COMMANDS
Access TH Reads or writes high
temperature limit value into TH
register. A1h <write data> 2
Access TL Reads or writes low
temperature limit value into TL
register. A2h <write data> 2
Access Config Reads or writes configuration
data to configuration register. ACh <write data> 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 E
2
typically requires 10ms at room temperature. After issuing a write command, no
further writes should be requested for at least 10 ms.