DS1631/DS1631A/DS1731

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Table 5. CONFIGURATION REGISTER BIT DESCRIPTIONS

BIT NAME

(USER ACCESS)

FUNCTIONAL DESCRIPTION

DONE—Temperature

Conversion Done

(Read Only)

Power-up state = 1.

DONE = 0. Temperature conversion is in progress.

DONE = 1. Temperature conversion is complete.

THF—Temperature High Flag

(Read/Write)

Power-up state = 0.

THF = 0. The measured temperature has not exceeded the value

THF = 1. At some point since power-up the measured temperature

a 1 until it is overwritten with a 0 by the user, the power is cycled, or

a Software POR command is issued.

TLF—Temperature Low Flag

(Read/Write)

Power-up state = 0.

TLF = 0. The measured temperature has not been lower than the

TLF = 1. At some point since power-up the measured temperature

1 until it is overwritten with a 0 by the user, the power is cycled, or a

Software POR command is issued.

NVB—NV Memory Busy

(Read Only)

Power-up state = 0.

NVB = 1. A write to EEPROM memory is in progress.

NVB = 0. NV memory is not busy.

R1—Resolution Bit 1

(Read/Write)

Power-up state = 1.

R0—Resolution Bit 0

(Read/Write)

Power-up state = 1.

(Read/Write)

Power-up state = last value written to this bit. Factory setting = 0.

1SHOT*—Conversion Mode

(Read/Write)

Power-up state = last value written to this bit. Factory setting = 0.

1SHOT = 1. One-Shot Mode. The Start Convert T command initiates

a single temperature conversion and then the device goes into a low-

power standby state.

1SHOT = 0. Continuous Conversion Mode. The Start Convert T

command initiates continuous temperature conversions.

*Stored in EEPROM

Table 6. RESOLUTION CONFIGURATION

R1

R0

RESOLUTION

(BIT)

CONVERSION TIME

(MAX)

0

0

9

93.75ms

0

1

10

187.5ms

1

0

11

375ms

1

1

12

750ms