Rainbow-electronics DS75LV Bedienungsanleitung PDF herunterladen (Seite 8)

DS75LV: Digital Thermometer and Thermostat

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Table 3. Configuration Register Bit Descriptions

BIT NAME FUNCTIONAL DESCRIPTION

Reserved

Power-up state = 0

The master can write to this bit, but it will always read out as a 0.

Conversion Resolution Bit 1

Power-up state = 0

Sets conversion resolution (see Table 5)

Conversion Resolution Bit 0

Power-up state = 0

Sets conversion resolution (see Table 5)

Thermostat Fault Tolerance Bit 1

Power-up state = 0

Sets the thermostat fault tolerance (see Table 6).

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.

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.

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

1 2 3 4 5 6 7 8 9 10 11 12 13

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