Rainbow Electronics DS1720 - Manual (Page 7)

DS1720
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DS1720 COMMAND SET Table 3
INSTRUCTION DESCRIPTION PROTOCOL
3–WIRE BUS
DATA AFTER
ISSUING
PROTOCOL NOTES
TEMPERATURE CONVERSION COMMANDS
Read Temperature Reads last converted temperature
value from temperature register AAh <read data>
Read Counter Reads value of count remaining from
counter A0h <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
Write TH Writes high temperature limit value into
TH register 01h <write data> 2
Write TL Writes low temperature limit value into
TL register 02h <write data> 2
Read TH Reads stored value of high tempera-
ture limit from TH register A1h <read data> 2
Read TL Reads stored value of low temperature
limit from TL register A2h <read data> 2
Write Config Writes configuration data to configura-
tion register 0Ch <write data> 2
Read Config Reads configuration data from configu-
ration register ACh <read 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 10 ms at room temperature. After issuing a write command, no further writes
should be requested for at least 10 ms.