Rainbow Electronics DS75LV - Manual (Page 8)

DS75LV: Digital Thermometer and Thermostat
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Table 3. Configuration Register Bit Descriptions
BIT NAME FUNCTIONAL DESCRIPTION
0
Reserved Power-up state = 0
The master can write to this bit, but it will always read out as a 0.
R1
Conversion Resolution Bit 1 Power-up state = 0
Sets conversion resolution (see Table 5)
R0
Conversion Resolution Bit 0 Power-up state = 0
Sets conversion resolution (see Table 5)
F1
Thermostat Fault Tolerance Bit 1 Power-up state = 0
Sets the thermostat fault tolerance (see Table 6).
F0
Thermostat Fault Tolerance Bit 0 Power-up state = 0
Sets the thermostat fault tolerance (see Table 6).
POL
Thermostat Output (O.S.) Polarity Power-up state = 0
POL = 0 — O.S. is active low.
POL = 1 — O.S. is active high.
TM
Thermostat Operating Mode Power-up state = 0
TM = 0 — Comparator mode.
TM = 1 — Interrupt mode.
See the OPERATION–Thermostat section for a detailed description of
these modes.
SD
Shutdown Power-up state = 0
SD = 0 — Active conversion and thermostat operation.
SD = 1 — Shutdown mode.
See the SHUTDOWN MODE section for a detailed description of this
mode.
Table 4. Resolution Configuration
R1 R0
THERMOMETER
RESOLUTION
MAX CONVERSION
TIME
0 0 9-bit 150ms
0 1 10-bit 300ms
1 0 11-bit 600ms
1 1 12-bit 1200ms
Table 5. Fault Tolerance Configuration
F1 F0
CONSECUTIVE OUT-OF-LIMITS
CONVERSIONS TO TRIGGER O.S.
0 0 1
0 1 2
1 0 4
1 1 6