DS1626 Datasheet, PDF (12/13 Pages) Dallas Semiconductor – High-Precision 3-Wire Digital Thermometer and Thermostat

Figure 7. 3-WIRE COMMUNICATION
a) Start Temperature Conversion
RST
CLK
DQ
10001010
DS1626/DS1726
Start Convert T [51h] Command
b) Write to the T_H/T_L Registers
RST
×××
CLK
×××
DQ
C0 C1 0 0 0 0 0 0 D0 D1 D₂ D3 D₄ D₅ D₆ D₇ D₈ D₉ D₁₀ D₁₁
Write TH [01h] or TL [02h] Command
T_H or T_L Data from Master
c) Write to the Configuration Register
RST
CLK
DQ
0 0 1 1 0 0 0 0 D₀ D₁ D₂ D₃ D₄ D₅ D₆ D₇
Write Config [0Ch] Command
Configuration Reg. Data from Master
d) Read from the Temperature Register
×××
RST
CLK
DQ ¹
×××
0 1 0 1 0 1 0 1 D0 D1 D2 D3 D4 D5 D6 D7 D8 D₉ D10 D11 0 0 0 ^{× × ×}
Read Temperature [AAh] Command
Temperature Data from DS1626/DS1726
e) Read from the Configuration Register
RST
CLK
DQ
0 0 1 1 0 1 0 1 D₀ D₁ D₂ D₃ D₄ D₅ D₆ D₇
Read Config [ACh] Command Configuration Reg. Data from DS1626/DS1726
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