Datasheet

DS1720
10 of 14
FUNCTION EXAMPLE
Example: CPU sets up DS1720 for continuous conversion and thermostatic function.
CPU MODE
DS1720 MODE
(3-WIRE) DATA (LSB FIRST) COMMENTS
TX RX 0Ch TCPU issues Write Config command
TX RX 00h CPU sets DS1720 up for continuous
conversion
TX RX
Toggle RST
CPU issues Reset to DS1720
TX RX 01h CPU issues Write T
H
command
TX RX 0050h
CPU sends data for T
H
limit of +40°C
TX RX
Toggle RST
CPU issues Reset to DS1720
TX RX 02h CPU issues Write T
L
command
TX RX 0014h
CPU sends data for T
L
limit of +10°C
TX RX
Toggle
RST
CPU issues Reset to DS1720
TX RX A1h CPU issues Read T
H
command
RX TX 0050h DS1720 sends back stored value of T
H
for CPU to verify
TX RX
Toggle RST
CPU issues Reset to DS1720
TX RX A2h CPU issues Read T
L
command
RX TX 0014h DS1720 sends back stored value of T
L
for CPU to verify
TX RX
Toggle RST
RST CPU issues Reset to DS1720
TX RX EEh CPU issues Start Convert T command
TX RX
Toggle RST
CPU issues Reset to DS1720