DS1620 Datasheet, PDF (9/13 Pages) Dallas Semiconductor – Digital Thermometer and Thermostat

DS1620
FUNCTION EXAMPLE
Example: CPU sets up DS1620 for continuous conversion and thermostatic function.
DS1620 MODE
CPU MODE (3-WIRE) DATA (LSB FIRST)
COMMENTS
TX
RX
0Ch
CPU issues Write Config command
TX
RX
00h
CPU sets DS1620 up for continuous
conversion
TX
RX
Toggle RST
CPU issues Reset to DS1620
TX
RX
01h
CPU issues Write TH command
TX
RX
0050h
CPU sends data for TH limit of +40°C
TX
RX
Toggle RST
CPU issues Reset to DS1620
TX
RX
02h
CPU issues Write TL command
TX
RX
0014h
CPU sends data for TL limit of +10°C
TX
RX
Toggle RST
CPU issues Reset to DS1620
TX
RX
A1h
CPU issues Read TH command
RX
TX
0050h
DS1620 sends back stored value of TH for
CPU to verify
TX
RX
Toggle RST
CPU issues Reset to DS1620
TX
RX
A2h
CPU issues Read TL command
RX
TX
0014h
DS1620 sends back stored value of TL for
CPU to verify
TX
RX
Toggle RST
CPU issues Reset to DS1620
TX
RX
EEh
CPU issues Start Convert T command
TX
RX
Drop RST
CPU issues Reset to DS1620
READ DATA TRANSFER Figure 4
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