Rainbow Electronics DS1720 User Manual
Page 8
DS1720
030598 8/12
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
CPU 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 TH command
TX
RX
0050h
CPU sends data for TH limit of +40
°
C
TX
RX
Toggle RST
CPU issues Reset to DS1720
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 DS1720
TX
RX
A1h
CPU issues Read TH command
RX
TX
0050h
DS1720 sends back stored value of TH for CPU
to verify
TX
RX
Toggle RST
CPU issues Reset to DS1720
TX
RX
A2h
CPU issues Read TL command
RX
TX
0014h
DS1720 sends back stored value of TL for CPU
to verify
TX
RX
Toggle RST
CPU issues Reset to DS1720
TX
RX
EEh
CPU issues Start Convert T command
TX
RX
Toggle RST
CPU issues Reset to DS1720